///////////////////////
// DEFINE VARIABLES //
//////////////////////
window.types = new Array('start','pause','stop','clear','redo','undo','save','open');
window.nonOnOff = new Array('redo','undo','save','open');

var mapCenter = ', , ,  ';
var startZoom = 14;
var map;

/////////////////////
// PRELOAD IMAGES //
////////////////////
if (document.images)
{
 var x, tmp;
 window.pics = new Array();
 for (x in window.types)
 {
  tmp = window.types[x];
  window.pics[tmp] = new Image(38,36); 
  window.pics[tmp].src = "/images/map/"+tmp+"_over.png"; 
 }
}

///////////////
// LOAD MAP //
//////////////
function init()
{
 if(GBrowserIsCompatible())
 {
  map = new GMap2(document.getElementById("map"),{size:new GSize(715,300)});
//  var location = new GLatLng(centerLatitude, centerLongitude);
//  map.setCenter(location, startZoom);
  if(!mapCenter) { var location = new GLatLng(centerLatitude, centerLongitude); map.setCenter(location, startZoom); }
  else { geocoder = new GClientGeocoder(); setCenterLocation(mapCenter,startZoom); }
  map.addControl(new GLargeMapControl3D());
  map.addControl(new GMapTypeControl());
  map.addMapType(G_PHYSICAL_MAP);
  GEvent.addListener(map,'click',function(overlay,latlng){ addMarker(overlay,latlng); });
  geocoder = new GClientGeocoder();
  openCourseLink();
 }
}
window.onload = init;
window.onunload = GUnload;

//////////////////////////
// SET CENTER LOCATION //
/////////////////////////
    function setCenterLocation(address,startZoom) {
      if (geocoder) {
        geocoder.getLatLng(
          address,
          function(point) {
            if(!point) { point = window.centerLatitude+','+window.centerLongitude; }
              map.setCenter(point, startZoom);
          }
        );
      }
    }

////////////////////////////////
// ROUTE RECORDING FUNCTIONS //
///////////////////////////////
function recording(type)
{
 if(!(in_array(type, window.nonOnOff)))
 {
  window.start = false;
  window.pause = false;
  window.stop = false;
  for (x in window.types)
  {
   if(window.types[x]!=type)
   {
    tmpName = window.types[x]+'State'; window[tmpName] = 'out';
    document.getElementById(window.types[x]).src = '/images/map/'+window.types[x]+'.png';
   }
   else if(window.types[x]==type && window.types[x]!='clear') { key = x; window[type+'State'] = 'on'; document.getElementById(type).src = '/images/map/'+type+'_over.png'; }
  }
 }
 if(type=='start') { window.start = true; }
 if(type=='pause') { window.pause = true; }
 if(type=='stop') { stopR(); }
 if(type=='clear') { clearR(); }
 if(type=='save') { saveC(); }
 if(type=='open') { openC(); }
}

/////////////////////
// STOP RECORDING //
////////////////////
function stopR()
{
  window.stop = true;
  window.point1 = '';
  window.click = 'point1';
}

////////////////
// CLEAR MAP //
///////////////
function clearR()
{
 map.clearOverlays();
 window.mileArr = [];
 window.polylineArr = [];
 window.markerArr = [];
 document.getElementById('distance').innerHTML = '0.00';
 window.d = 0;
 window.point1 = '';
 window.click = 'point1';
 document.getElementById('clear').src = '/images/map/clear.png';
 window.userEvents = new Array();
 window.eventOn = 0;
}

//////////////////
// SAVE COURSE //
/////////////////
function saveC()
{
 openPopup();
 ajaxINT('save',window.d);
}

//////////////////
// OPEN COURSE //
/////////////////
function openC()
{
 openPopup();
 ajaxINT('open','');
}

/////////////////////////
// RECORD USER EVENTS //
////////////////////////
window.userEvents = new Array();
window.eventOn = 0;
function recordEvents(value)
{
 var n = (window.eventOn *1) + 1;
 window.userEvents[n] = value;
 window.eventOn = n;
}

//////////////////////
// UNDO USER EVENT //
/////////////////////
window.recentlyStopped = false;
function undoEvent()
{
 var l = window.eventOn;
 var n = (l *1) -1;
 if(n<0) { alert("Nothing left to undo!"); return false; }
 window.eventOn = n;
 var arr = window.userEvents[l].split('*|*');
 if(arr[0]=='click')
 {
  var o = window.d;
   // calculate & subtract distance of point
  var d = (window.d *1) - (arr[1] *1);
  if(d<=0 || d<0.000000000000001) { d = '0.00'; }
  document.getElementById('distance').innerHTML = decial2Places(d);
  window.d = d;
   // remove marker, ployline, and mile marker
  map.removeOverlay(window.markerArr[n]);
  map.removeOverlay(window.polylineArr[n]);
  removeMileMarker(o,d);
  window.point1 = window.latlngArr[(n -1)];
  map.panTo(window.latlngArr[(n -1)]);
 }
   // add past maker back in
  if(n>=2)
  {
   var icon = new GIcon();
   icon.image = '/images/map/foot_icon.png';
   icon.iconSize = new GSize(35,17);
   icon.iconAnchor = new GPoint(14,14);
   var latlng = window.latlngArr[(n -1)];
   var marker = new GMarker(latlng,icon);
   map.addOverlay(marker);
   window.markerArr[(n-1)] = marker;
  }
 if(arr[0]=='marker')
 {
  map.removeOverlay(window.markerArr[n]);
  window.click = 'point1';
  map.panTo(window.latlngArr[n]);
 }
 window.recentlyStopped = true;
 window.undoWas = true;
}

//////////////////////
// REDO USER EVENT //
/////////////////////
function redoEvent()
{
 var o = window.d;
 var t = (window.userEvents.length *1) - 1;
 var l = window.eventOn;
 var n = (l *1) +1;
 if(n>t) { alert("Nothing left to redo!"); return false; }
 window.eventOn = n;
 var arr = window.userEvents[n].split('*|*');
 if(arr[0]=='click')
 {
   // calculate & add distance of point
  var d = (window.d *1) + (arr[1] *1);
  document.getElementById('distance').innerHTML = decial2Places(d);
  window.d = d;
   // remove past maker
  if(l>=2) { map.removeOverlay(window.markerArr[(l-1)]); }
   // add marker, ployline, and mile marker
  map.addOverlay(window.markerArr[l]);
  map.addOverlay(window.polylineArr[l]);
  addMileMarker(d,o);
  window.click = 'point2';
  window.point1 = window.latlngArr[l];
  map.panTo(window.latlngArr[l]);
 }
 if(arr[0]=='marker')
 {
  map.addOverlay(window.markerArr[l]);
  window.click = 'point2';
  window.point1 = window.latlngArr[l];
  map.panTo(window.latlngArr[l]);
 }
}

/////////////////
// ADD MARKER //
////////////////
window.markerArr = new Array();
window.latlngArr = new Array();
function addMarker(overlay,latlng)
{
 if(window.start)
 {
//  if(window.recentlyStopped)
//  { window.click = 'point2'; window.eventOn = window.point1 = window.latlngArr[(window.eventOn-1)]; window.recentlyStopped = false; }
  window.undoWas = false;
  var icon = new GIcon();
  icon.image = '/images/map/foot_icon.png';
  icon.iconSize = new GSize(35,17);
  icon.iconAnchor = new GPoint(14,14);
  var marker = new GMarker(latlng,icon);
  map.addOverlay(marker);
  map.panTo(latlng);
  var n = window.eventOn;
  if(window.eventOn==0 || window.click=='point1') { recordEvents('marker'); }
  if(n>=2) { map.removeOverlay(window.markerArr[(n-1)]); }
  window.markerArr[n] = marker;
  window.latlngArr[n] = latlng;
  userClicks(latlng);
 }
}

////////////////////
// REMOVE MARKER //
///////////////////
function removeMarker(n)
{
 var i = 0;
 marker = map.getFirstMarker();
 while(marker!=null)
 {
  if(i==n) { marker.remove(); }
  marker = map.getNextMarker();
  i++;
 }
}

///////////////////////
// JUMP TO LOCATION //
//////////////////////
function jumpTo()
{
 var zoom = map.getZoom();
 var address = document.getElementById('jumpTo').value;
 if (geocoder)
 {
  geocoder.getLatLng(
          address,
          function(point) {
            if (!point) {
              alert("Error - Address was not found! \n\n Please try again.");
            } else {
              map.setCenter(point, zoom);
            }
          }
        );
      }
}

///////////////////
// ADD POLYLINE //
//////////////////
window.polylineArr = new Array();
function addPolyline(latlng1,latlng2,color,width)
{
 var polyline = new GPolyline([latlng1,latlng2], color, width);
 map.addOverlay(polyline);
 var n = window.eventOn;
 window.polylineArr[n] = polyline;
 processMiles();
}

/////////////////////
// PROCESS CLICKS //
////////////////////
window.point1 = '';
window.click = 'point1';
function userClicks(latlng)
{
 if(window.click=='point1') { window.point1 = latlng; window.click = 'point2'; }
 else if(window.click=='point2')
 { addPolyline(window.point1,latlng,"#ff0000",5); showDistance(window.point1+', '+latlng); window.point1 = latlng;  }
 else { alert("There was an internal error with the Google Map! \n\n Please try mapping your course again."); }
}

//////////////////////////
// SHOW TOTAL DISTANCE //
/////////////////////////
window.d = 0;
function showDistance(points)
{
 var o = window.d;
 var latlng = points.split(',');
 var lat1 = latlng[0].substr((latlng[0].indexOf('(')+1));
 var lon1 = latlng[1].substr(0,(latlng[1].indexOf(')')));
 var lat2 = latlng[2].substr((latlng[2].indexOf('(')+1));
 var lon2 = latlng[3].substr(0,(latlng[3].indexOf(')')));
 var calcD = calcDistance(lat1,lon1,lat2,lon2) *1;
 recordEvents('click*|*'+calcD);
 var d = (window.d * 1) + calcD;
 window.d = d;
 document.getElementById('distance').innerHTML = decial2Places(d);
}

/////////////////////////
// CALCULATE DISTANCE //
////////////////////////
function toRad(degrees)
{
 yo=(2*Math.PI)/360;
 return (degrees * yo);
}
function decial2Places(n)
{
 var num = n.toString();
 var e = num.indexOf('.');
 if(num.substr((e+3),1) >= 5)
 {
  num = num.substring(0,(e+3));
  num = (num *1) + 0.01;
  num = num.toString();
 }
 return num.substring(0,(e+3));
}
function calcDistance(lat1,lon1,lat2,lon2)
{
 var R = 6371; // km
 var dLat = toRad((lat2-lat1));
 var dLon = toRad((lon2-lon1)); 
 var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
         Math.cos(toRad(lat1)) * Math.cos(toRad(lat2)) * 
         Math.sin(dLon/2) * Math.sin(dLon/2); 
 var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
 var d = R * c;
 return (d / 1.609);
}

///////////////////////////////
// MOUSEOVER TOOLBAR IMAGES //
//////////////////////////////
function imageChange(type)
{
 var state = window[type+'State'];
 if(state=='out' || state=='' || !state)
 {
  document.getElementById(type).src = '/images/map/'+type+'_over.png';
  window[type+'State'] = 'over';
 }
 else if(state=='over')
 {
  document.getElementById(type).src = '/images/map/'+type+'.png';
  window[type+'State'] = 'out';
 }
}

////////////////////////////
// PROCESS SAVING COURSE //
///////////////////////////
function doSave()
{
 var p,t,i,m,l,x,s,d,courseName,query;
  // Fix for part of bug fix when saving unedited opened courses
  if(window.userEvents.length>1 && window.userEvents[window.userEvents.length - 1]=='marker')
  { window.userEvents = removeKey(window.userEvents,(window.userEvents.length - 1)); }
 p = '';
 for (x in window.userEvents) { p += ';'+x+'=>'+window.userEvents[x]; }
 p = p.substr(1);
 m = '';
 for (x in window.markerArr) { m += ';'+x+'=>'+window.markerArr[x]; }
 m = m.substr(1);
 l = '';
 for (x in window.latlngArr) { l += ';'+x+'=>'+window.latlngArr[x]; }
 l = l.substr(1);
 t = document.getElementById('savetype').value;
 i = document.getElementById('coursePick').value;
 if(document.getElementById('shared').checked==true) { s = 'Y'; } else { s = 'N'; }
 courseName = document.getElementById('courseName').value;
 d = addslashes(document.getElementById('description').value);
 // Reverse geocode
  // http://googlegeodevelopers.blogspot.com/2008/10/geocoding-in-reverse.html
  geocoder = new GClientGeocoder();
  geocoder.getLocations(window.latlngArr[0],function(response) 
  {
   if(response.Status.code!=200)
   {
    stateAbv = '';
    countryAbv = '';
   }
   else
   {
    place = response.Placemark[0];
    stateAbv = place.AddressDetails.Country.AdministrativeArea.AdministrativeAreaName;
    countryAbv = place.AddressDetails.Country.CountryNameCode;
   }
 // Create query string
 query = 'doSave=Y&type='+t+'&id='+i+'&courseName='+courseName+'&shared='+s+'&miles='+window.d+'&state='+stateAbv+'&country='+countryAbv+'&events='+p+'&markers='+m+'&latlng='+l+'&description='+d;
 document.getElementById('saveButton').style.display='none';
 document.getElementById('processing').innerHTML='<label style="float:left;width:70px;">&nbsp;</label><img src="/user/images/ajax-loader-small.gif" alt=""> saving...';
 document.getElementById('processing').style.display='block';
 ajaxINT('doSave',query);

  });
}

//////////////////////////
// PROCESS OPEN COURSE //
/////////////////////////
function openCourse(id)
{
 clearR();
 var p,x,k,v,t,l,lt,lk,lv,n;
 window.userEvents = new Array();
 window.d = 0;
 p = id+'p';
 l = id+'l';
 p = document.getElementById(p).value.split(';');
 l = document.getElementById(l).value.split(';');
 n = p.length - 1;
 for (x in p)
 {
  t = p[x].split('=>'); k = t[0]; v = t[1];
  lt = l[x].split('=>'); lk = lt[0]; lv = lt[1];
//  window.userEvents[k] = v;
  if(x==0) { applyEvents(k,v,lv,x,'S'); } else if(n==x) { applyEvents(k,v,lv,x,'E'); } else { applyEvents(k,v,lv,x,''); }
 }
 window.eventOn = p.length - 1;
 closeWindow();
}

window.lastApply = '';
function applyEvents(l,arr,latlng,x,position)
{
  window.eventOn = x; // FIX PROBLEM WITH THIS
  arr = arr.split('*|*');
  latlng = latlng.replace('(','');
  latlng = latlng.replace(')','');
  latlng = latlng.split(',');
  lat = latlng[0];
  lng = latlng[1];
 if(arr[0]=='click')
 {
   // calculate & add distance of point
  var d = (window.d *1) + (arr[1] *1);
  document.getElementById('distance').innerHTML = decial2Places(d);
  window.d = d;
  // get last points
  var  latlngO = window.lastApply
  latlngO = latlngO.split(',');
  latO = latlngO[0];
  lngO = latlngO[1];
   // add ployline
  var latlngA = new GLatLng(latO, lngO);
  var latlngB = new GLatLng(lat, lng);
  var latlngVal = latlngA,latlngB;
  window.latlngArr[(x-1)] = latlngVal;
  var polyline = new GPolyline([latlngA,latlngB], "#ff0000", 5);
  map.addOverlay(polyline);
  // record events
  var points = latlngA+','+latlngB;
  var latlng = points.split(',');
  var lat1 = latlng[0].substr((latlng[0].indexOf('(')+1));
  var lon1 = latlng[1].substr(0,(latlng[1].indexOf(')')));
  var lat2 = latlng[2].substr((latlng[2].indexOf('(')+1));
  var lon2 = latlng[3].substr(0,(latlng[3].indexOf(')')));
  var calcD = calcDistance(lat1,lon1,lat2,lon2) *1;
  recordEvents('click*|*'+calcD);

/*
PROBLEM: mile markers not showing up in right places with following commented JS - markers are always off to left right in a group and for longer polylines they do strech out instead of being in a group
I've outline 2 ways of getting the mile markers below
SOLUTION: get commented JS some how to get mile markers in correct positions
WAY 1:
window.eventOn = x;
window.polylineArr[x] = polyline;
processMiles();
WAY 2: REMOVE var polyine AND map.addOverlay IN LINES ABOVE COMMENTS
window.eventOn = x;
addPolyline((new GLatLng(latO, lngO)),(new GLatLng(lat, lng)),"#ff0000",5);

*/

  window.lastApply = lat+','+lng;
 }
 if(arr[0]=='marker' || position=='E')
 {
  var icon = new GIcon();
  if(position!='E')
  {
   icon.image = '/images/map/foot_icon.png';
   icon.iconSize = new GSize(35,17);
   icon.iconAnchor = new GPoint(14,14);
  }
  else
  {
   icon.image = '/images/map/flag_icon.png';
   icon.iconSize = new GSize(20,20);
   icon.iconAnchor = new GPoint(1,19);
  }
  var point = new GLatLng(lat,lng);
  var marker = new GMarker(point,icon);
  map.addOverlay(marker);
  window.markerArr[x] = marker;
  window.userEvents[(x+1)] = 'marker';
  window.lastApply = lat+','+lng;
 }
 if(position=='S') { map.panTo(new GLatLng(lat,lng)); }
}

////////////////////////////
// OPEN COURSE FROM LINK //
///////////////////////////
function openCourseLink()
{
 var p,x,k,v,t,l,lt,lk,lv,n;
 window.userEvents = new Array();
 window.d = 0;
 p = 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-79.92819115519524);362=>(40.71404324732112,        -79.9282206594944)'; p = p.split(';');
 l = l.split(';');
 n = p.length - 1;
 for (x in p)
 {
  t = p[x].split('=>'); k = t[0]; v = t[1];
  lt = l[x].split('=>'); lk = lt[0]; lv = lt[1];
//  window.userEvents[k] = v;
  if(x==0) { applyEvents(k,v,lv,x,'S'); } else if(n==x) { applyEvents(k,v,lv,x,'E'); } else { applyEvents(k,v,lv,x,''); }
 }
 window.eventOn = p.length - 1;
}

////////////////////////
// OPEN COURSES PAGE //
///////////////////////
function coursePage(url)
{
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX! \n\n Please download firefox it does, you are being redirected to their website.");
  window.location="http://www.getfirefox.com";
  return;
  }
 document.getElementById('popupInner').innerHTML = '<img src="/user/images/ajax-loading.gif" alt="Loading"><div style="margin-top:2px;font-size:11px;">Loading...</div>';
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
xmlHttp.send(null);
}

/////////////////////////
// IN ARRARY FUNCTION //
////////////////////////
function in_array(needle, haystack, strict) {
    // http://kevin.vanzonneveld.net
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // *     example 1: in_array('van', ['Kevin', 'van', 'Zonneveld']);
    // *     returns 1: true
 
    var found = false, key, strict = !!strict;
 
    for (key in haystack) {
        if ((strict && haystack[key] === needle) || (!strict && haystack[key] == needle)) {
            found = true;
            break;
        }
    }
 
    return found;
}

////////////////////
// Delete Course //
///////////////////
function deleteCourse(q)
{
 if(confirm('Are you sure you want to delete this course?')) { coursePage(q); }
 return false;
}

/////////////////
// OPEN POPUP //
////////////////
function openPopup()
{ 
 coverPage();
 document.getElementById('popupInner').innerHTML = '<img src="/user/images/ajax-loading.gif" alt="Loading"><div style="margin-top:2px;font-size:11px;">Loading...</div>';
 document.getElementById('popup').style.display='block';
}

/////////////////
// COVER PAGE //
////////////////
function coverPage()
{
 document.getElementById('cover').style.height=getPageSizeWithScroll('height')+'px';
 document.getElementById('cover').style.display='block';
//alert(document.getElementById('cover').offsetRight+' '+document.getElementById('cover').style.width+' '+document.body.clientWidth);
}

////////////////////////////
// CLOSE COVER AND POPUP //
///////////////////////////
function closeWindow()
{
 document.getElementById('popup').style.display='none';
 document.getElementById('cover').style.display='none';
 return false;
}

///////////////////////////////
// GET BROWSER WIDTH HEIGHT //
//////////////////////////////
function getPageSizeWithScroll(which)
{
	if (window.innerHeight && window.scrollMaxY) {// Firefox
		yWithScroll = window.innerHeight + window.scrollMaxY;
		xWithScroll = window.innerWidth + window.scrollMaxX;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		yWithScroll = document.body.scrollHeight;
		xWithScroll = document.body.scrollWidth;
	} else { // works in Explorer 6 Strict, Mozilla (not FF) and Safari
		yWithScroll = document.body.offsetHeight;
		xWithScroll = document.body.offsetWidth;
  	}
	arrayPageSizeWithScroll = new Array(xWithScroll,yWithScroll);
	//alert( 'The height is ' + yWithScroll + ' and the width is ' + xWithScroll + ' yscroll bar is: ' + document.body.scrollLeft);
	if(which=='width') { return xWithScroll; }
	if(which=='height') { return yWithScroll; }
}

/////////////////////////
// SET OBJECT TO FADE //
////////////////////////
var TimeToFade = 1000.0;
function fade(eid)
{
  var element = document.getElementById(eid);
  if(element == null)
    return;
   
  if(element.FadeState == null)
  {
    if(element.style.opacity == null
        || element.style.opacity == ''
        || element.style.opacity == '1')
    {
      element.FadeState = 2;
    }
    else
    {
      element.FadeState = -2;
    }
  }
   
  if(element.FadeState == 1 || element.FadeState == -1)
  {
    element.FadeState = element.FadeState == 1 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade - element.FadeTimeLeft;
  }
  else
  {
    element.FadeState = element.FadeState == 2 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade;
    setTimeout("animateFade(" + new Date().getTime()
        + ",'" + eid + "')", 33);
  } 
  return false;
}

//////////////////////////
// ANIMATE FADE OBJECT //
/////////////////////////
function animateFade(lastTick, eid)
{ 
  var curTick = new Date().getTime();
  var elapsedTicks = curTick - lastTick;
 
  var element = document.getElementById(eid);
 
  if(element.FadeTimeLeft <= elapsedTicks)
  {
    element.style.opacity = element.FadeState == 1 ? '1' : '0';
    element.style.filter = 'alpha(opacity = '
        + (element.FadeState == 1 ? '100' : '0') + ')';
    element.FadeState = element.FadeState == 1 ? 2 : -2;
    if(element.style.filter==0 || element.style.opacity==0) { document.getElementById(eid).style.display='none'; }
    return;
  }
 
  element.FadeTimeLeft -= elapsedTicks;
  var newOpVal = element.FadeTimeLeft/TimeToFade;
  if(element.FadeState == 1)
    newOpVal = 1 - newOpVal;

  element.style.opacity = newOpVal;
  element.style.filter =
      'alpha(opacity = ' + (newOpVal*100) + ')';
 
  setTimeout("animateFade(" + curTick
      + ",'" + eid + "')", 33);
}

//////////////////////////////
// CHANGE OPACITY FUNCTION //
/////////////////////////////
function changeOpac(object,opacity)
{
 var object = document.getElementById(object);
 object.style.opacity = (opacity / 100);
 object.style.MozOpacity = (opacity / 100);
 object.style.KhtmlOpacity = (opacity / 100);
 object.style.filter = "alpha(opacity=" + opacity + ")";
}

////////////////////
// INITIATE AJAX //
///////////////////
var xmlHttp;
function ajaxINT(type,v)
{
window.ajaxType = type;
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX! \n\n Please download firefox it does, you are being redirected to their website.");
  window.location="http://www.getfirefox.com";
  return;
  }
var url,query;
if(type=='save') { url ="/user/includes/gmap.save.php"; query = 'miles='+v+'&courseId=10'; }
if(type=='doSave') { url ="/user/includes/gmap.save.php"; query = v; }
if(type=='open') { url ="/user/includes/gmap.open.php"; query = v; }
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("POST",url,true);
xmlHttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
xmlHttp.send(query);
} 

///////////////////////////////
// ON AJAX RESULTS RETURNED //
//////////////////////////////
function stateChanged() 
{ 
if (xmlHttp.readyState==4)
 {
  if(xmlHttp.status==200)
  {
   if(window.ajaxType=='doSave')
   {
    if(xmlHttp.responseText=='success')
    {
     document.getElementById('statusInner').innerHTML = '<div style="position:absolute;top:-18px;right:-18px;"><a href="log.php" title="Close Window" onClick="fade(\'popupStatus\');return false;"><div id="closeicon"><img src="images/blank.gif" width="33" height="33" border="0" alt=""></div></a></div>Success - course has been saved!';
     document.getElementById('popupStatus').FadeState = '';
     document.getElementById('popupStatus').style.display='block';
     fade('popupStatus');
     setTimeout("fade('popupStatus')",5000); 
     closeWindow();
    } 
    else if(xmlHttp.responseText=='no auth')
    {
     alert("Error - Your not logged in any more! \n\n Please login and try again.");
     document.getElementById('saveButton').style.display='block';
     document.getElementById('processing').style.display='none';
    } 
    else
    {
     alert("Error - there was a problem saving!\n\nPlease try again.\n\n"+xmlHttp.responseText);
     document.getElementById('saveButton').style.display='block';
     document.getElementById('processing').style.display='none';
    } 
   } 
   else { document.getElementById('popupInner').innerHTML = xmlHttp.responseText; }
  }
 }
}

/////////////////////////////
// SET UP AJAX CONNECTION //
////////////////////////////
function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}

///////////////////
// MILE MARKERS //
//////////////////
window.mileMarkers = 'off';
function markMiles()
{
 if(window.mileMarkers=='off')
 {
  window.mileMarkers = 'on';
  window['milesState'] = 'on'; document.getElementById('miles').src = '/images/map/miles_over.png';
  milesOn();
 } 
 else
 {
  window.mileMarkers = 'off';
  window['milesState'] = 'over'; document.getElementById('miles').src = '/images/map/miles.png';
  milesOff();
 } 
}

///////////////////////////
// TURN ON MILE MARKERS //
//////////////////////////
window.mileArr = new Array();
function milesOn()
{
 var i,x,d,m,c,n,poly,point,icon,marker,dLeft;
 n = window.eventOn;
 m = 1;
 window.mLeft = 0;
 if(window.undoWas) { n = n-1; }
 for(x in window.polylineArr)
 {
  if(x<=n)
  {
   poly = window.polylineArr[x];
   d = poly.Distance();
   dLeft = d;
   c = 1;
   for (i=(1609.344-window.mLeft); i<d; i+=1609.344)
   {
    point = poly.GetPointAtDistance(i);
    if(point)
    {
     icon = new GIcon();
     icon.iconSize = new GSize(24, 38);
     icon.iconAnchor = new GPoint(10, 34);    
     icon.image = '/images/map/gmap.mileMarker.php?mile='+m;
     marker = new GMarker(point,icon);
     map.addOverlay(marker);
     window.mileArr[m] = marker;
     if(c==1) { dLeft = dLeft - i; }
     else { dLeft = dLeft - 1609.344; }
     m++; c++;
    }
   }
   if(1609.344>d || m==window.mileArr.length) { window.mLeft += d; }
   else { window.mLeft = dLeft; }
  }
 }
}

////////////////////////////
// TURN OFF MILE MARKERS //
///////////////////////////
function milesOff()
{
 var x;
 for(x in window.mileArr)
 {
   map.removeOverlay(window.mileArr[x]);
 }
}

/////////////////////////
// REMOVE MILE MARKER //
////////////////////////
window.markerUndone = '';
function removeMileMarker(o,d)
{
 if(window.mileMarkers=='on')
 {
  o +='';
  o = o.split('.');
  o = o[0];
  d +='';
  d = d.split('.');
  d = (d[0] *1)+1;
  window.markerUndone = d;
  while (o>=d)
  {
   map.removeOverlay(window.mileArr[d]);
   d++;
  }
 }
}

//////////////////////
// ADD MILE MARKER //
/////////////////////
function addMileMarker(o,d)
{
 if(window.mileMarkers=='on')
 {
  o +='';
  o = o.split('.');
  o = o[0];
  d +='';
  d = d.split('.');
  d = (d[0] *1)+1;
  while (o>=d)
  {
   map.addOverlay(window.mileArr[d]);
   d++;
  }
 }
}

//////////////////////////
// PROCESS MILE MARKER //
/////////////////////////
function processMiles()
{
 var m = window.mileArr.length;
 if(window.markerUndone!='')
 {
  m = 0;
  window.markerUndone = '';
  milesOff();
 }
 if(window.mileMarkers=='on' & m!=0)
 {
  var i,x,d,c,n,poly,icon,marker,dLeft;
  n = window.eventOn;
  poly = window.polylineArr[n];
  d = poly.Distance();
  dLeft = d;
  for (i=(1609.344-window.mLeft); i<d; i+=1609.344)
  {
   var point = poly.GetPointAtDistance(i);
   if(point)
   {
    icon = new GIcon();
	icon.iconSize = new GSize(24, 38);
	icon.iconAnchor = new GPoint(10, 34);    
    icon.image = 'http://www.logthatrun.com/images/map/gmap.mileMarker.php?mile='+m;
    marker = new GMarker(point,icon);
    map.addOverlay(marker);
    window.mileArr[m] = marker;
    dLeft -= i;
    m++;
   }
  }
  if(1609.344>d || m==window.mileArr.length) { window.mLeft += d; }
  else { window.mLeft = dLeft; }
 }
 if(window.mileMarkers=='on' && m==0) { milesOn(); }
}

//////////////////
// ADD SLASHES //
//////////////////
function addslashes(str)
{
 str=str.replace(/\'/g,'\\\'');
 str=str.replace(/\"/g,'\\"');
 str=str.replace(/\\/g,'\\\\');
 str=str.replace(/\0/g,'\\0');
 return str;
}

////////////////////////////
// REMOVE KEY FROM ARRAY //
///////////////////////////
function removeKey(arrayName,key)
{
 var x;
 var tmpArray = new Array();
 for(x in arrayName)
 {
  if(x!=key) { tmpArray[x] = arrayName[x]; }
 }
 return tmpArray;
}

/*********************************************************************\
*                                                                     *
* epolys.js                                          by Mike Williams *
*                                                                     *
* A Google Maps API Extension                                         *
*                                                                     *
* Adds various Methods to GPolygon and GPolyline                      *
*                                                                     *
* .Contains(latlng) returns true is the poly contains the specified   *
*                   GLatLng                                           *
*                                                                     *
* .Area()           returns the approximate area of a poly that is    *
*                   not self-intersecting                             *
*                                                                     *
* .Distance()       returns the length of the poly path               *
*                                                                     *
* .Bounds()         returns a GLatLngBounds that bounds the poly      *
*                                                                     *
* .GetPointAtDistance() returns a GLatLng at the specified distance   *
*                   along the path.                                   *
*                   The distance is specified in metres               *
*                   Reurns null if the path is shorter than that      *
*                                                                     *
* .GetIndexAtDistance() returns the vertex number at the specified    *
*                   distance along the path.                          *
*                   The distance is specified in metres               *
*                   Reurns null if the path is shorter than that      *
*                                                                     *
* .Bearing(v1?,v2?) returns the bearing between two vertices          *
*                   if v1 is null, returns bearing from first to last *
*                   if v2 is null, returns bearing from v1 to next    *
*                                                                     *
*                                                                     *
***********************************************************************
*                                                                     *
*   This Javascript is provided by Mike Williams                      *
*   Blackpool Community Church Javascript Team                        *
*   http://www.commchurch.freeserve.co.uk/                            *
*   http://econym.googlepages.com/index.htm                           *
*                                                                     *
*   This work is licenced under a Creative Commons Licence            *
*   http://creativecommons.org/licenses/by/2.0/uk/                    *
*                                                                     *
***********************************************************************
*                                                                     *
* Version 1.1       6-Jun-2007                                        *
* Version 1.2       1-Jul-2007 - fix: Bounds was omitting vertex zero *
*                                add: Bearing                         *
*                                                                     *
\*********************************************************************/


// === A method for testing if a point is inside a polygon
// === Returns true if poly contains point
// === Algorithm shamelessly stolen from http://alienryderflex.com/polygon/ 
GPolygon.prototype.Contains = function(point) {
  var j=0;
  var oddNodes = false;
  var x = point.lng();
  var y = point.lat();
  for (var i=0; i < this.getVertexCount(); i++) {
    j++;
    if (j == this.getVertexCount()) {j = 0;}
    if (((this.getVertex(i).lat() < y) && (this.getVertex(j).lat() >= y))
    || ((this.getVertex(j).lat() < y) && (this.getVertex(i).lat() >= y))) {
      if ( this.getVertex(i).lng() + (y - this.getVertex(i).lat())
      /  (this.getVertex(j).lat()-this.getVertex(i).lat())
      *  (this.getVertex(j).lng() - this.getVertex(i).lng())<x ) {
        oddNodes = !oddNodes
      }
    }
  }
  return oddNodes;
}

// === A method which returns the approximate area of a non-intersecting polygon in square metres ===
// === It doesn't fully account for spechical geometry, so will be inaccurate for large polygons ===
// === The polygon must not intersect itself ===
GPolygon.prototype.Area = function() {
  var a = 0;
  var j = 0;
  var b = this.Bounds();
  var x0 = b.getSouthWest().lng();
  var y0 = b.getSouthWest().lat();
  for (var i=0; i < this.getVertexCount(); i++) {
    j++;
    if (j == this.getVertexCount()) {j = 0;}
    var x1 = this.getVertex(i).distanceFrom(new GLatLng(this.getVertex(i).lat(),x0));
    var x2 = this.getVertex(j).distanceFrom(new GLatLng(this.getVertex(j).lat(),x0));
    var y1 = this.getVertex(i).distanceFrom(new GLatLng(y0,this.getVertex(i).lng()));
    var y2 = this.getVertex(j).distanceFrom(new GLatLng(y0,this.getVertex(j).lng()));
    a += x1*y2 - x2*y1;
  }
  return Math.abs(a * 0.5);
}

// === A method which returns the length of a path in metres ===
GPolygon.prototype.Distance = function() {
  var dist = 0;
  for (var i=1; i < this.getVertexCount(); i++) {
    dist += this.getVertex(i).distanceFrom(this.getVertex(i-1));
  }
  return dist;
}

// === A method which returns the bounds as a GLatLngBounds ===
GPolygon.prototype.Bounds = function() {
  var bounds = new GLatLngBounds();
  for (var i=0; i < this.getVertexCount(); i++) {
    bounds.extend(this.getVertex(i));
  }
  return bounds;
}

// === A method which returns a GLatLng of a point a given distance along the path ===
// === Returns null if the path is shorter than the specified distance ===
GPolygon.prototype.GetPointAtDistance = function(metres) {
  // some awkward special cases
  if (metres == 0) return this.getVertex(0);
  if (metres < 0) return null;
  var dist=0;
  var olddist=0;
  for (var i=1; (i < this.getVertexCount() && dist < metres); i++) {
    olddist = dist;
    dist += this.getVertex(i).distanceFrom(this.getVertex(i-1));
  }
  if (dist < metres) {return null;}
  var p1= this.getVertex(i-2);
  var p2= this.getVertex(i-1);
  var m = (metres-olddist)/(dist-olddist);
  return new GLatLng( p1.lat() + (p2.lat()-p1.lat())*m, p1.lng() + (p2.lng()-p1.lng())*m);
}

// === A method which returns the Vertex number at a given distance along the path ===
// === Returns null if the path is shorter than the specified distance ===
GPolygon.prototype.GetIndexAtDistance = function(metres) {
  // some awkward special cases
  if (metres == 0) return this.getVertex(0);
  if (metres < 0) return null;
  var dist=0;
  var olddist=0;
  for (var i=1; (i < this.getVertexCount() && dist < metres); i++) {
    olddist = dist;
    dist += this.getVertex(i).distanceFrom(this.getVertex(i-1));
  }
  if (dist < metres) {return null;}
  return i;
}

// === A function which returns the bearing between two vertices in decgrees from 0 to 360===
// === If v1 is null, it returns the bearing between the first and last vertex ===
// === If v1 is present but v2 is null, returns the bearing from v1 to the next vertex ===
// === If either vertex is out of range, returns void ===
GPolygon.prototype.Bearing = function(v1,v2) {
  if (v1 == null) {
    v1 = 0;
    v2 = this.getVertexCount()-1;
  } else if (v2 ==  null) {
    v2 = v1+1;
  }
  if ((v1 < 0) || (v1 >= this.getVertexCount()) || (v2 < 0) || (v2 >= this.getVertexCount())) {
    return;
  }
  var from = this.getVertex(v1);
  var to = this.getVertex(v2);
  if (from.equals(to)) {
    return 0;
  }
  var lat1 = from.latRadians();
  var lon1 = from.lngRadians();
  var lat2 = to.latRadians();
  var lon2 = to.lngRadians();
  var angle = - Math.atan2( Math.sin( lon1 - lon2 ) * Math.cos( lat2 ), Math.cos( lat1 ) * Math.sin( lat2 ) - Math.sin( lat1 ) * Math.cos( lat2 ) * Math.cos( lon1 - lon2 ) );
  if ( angle < 0.0 ) angle  += Math.PI * 2.0;
  angle = angle * 180.0 / Math.PI;
  return parseFloat(angle.toFixed(1));
}

// === Copy all the above functions to GPolyline ===
GPolyline.prototype.Contains             = GPolygon.prototype.Contains;
GPolyline.prototype.Area                 = GPolygon.prototype.Area;
GPolyline.prototype.Distance             = GPolygon.prototype.Distance;
GPolyline.prototype.Bounds               = GPolygon.prototype.Bounds;
GPolyline.prototype.GetPointAtDistance   = GPolygon.prototype.GetPointAtDistance;
GPolyline.prototype.GetIndexAtDistance   = GPolygon.prototype.GetIndexAtDistance;
GPolyline.prototype.Bearing              = GPolygon.prototype.Bearing;