var startid = -1;
		var lastid;
		
		var map;
		var point;
		var markerOptions;
		
		var polyOptions = {geodesic:true};
		var polyline;
		
		var geoPoints = new Array();
		
		var drawingPolyArray;
		var oldPolyArray;
	   
	   function initialize() 
	   {	
			if (GBrowserIsCompatible()) 
			{
		        map = new GMap2(document.getElementById("map_canvas"));
		        map.setMapType(G_SATELLITE_MAP);
		        map.setCenter(new GLatLng(37, -100), 4);
		        map.addControl(new GSmallMapControl());
		        
		        
				// Create our "tiny" marker icon
				var tinyIcon = new GIcon();
				tinyIcon.image = "/dialer/images/yellowdot.png";
				tinyIcon.iconSize = new GSize(8, 8);
				tinyIcon.iconAnchor = new GPoint(4, 4);
				tinyIcon.infoWindowAnchor = new GPoint(8, 1);
				
				markerOptions = { icon:tinyIcon };
		        
		        getMarkers();
		        setInterval("getMarkers()",5000);
		        setInterval("clearOldMarkers()",1000);
			}
	    }
	    
	    function getMarkers() 
	    {
			var url = "livedata.jsp";
			var pars = "lastid=" + lastid;
			var myAjax = new Ajax.Request(url, {method:"get", parameters:pars, onComplete:showResponse});
		}
		
		function showResponse(originalRequest)
		{
			var result = originalRequest.responseText;
			eval(result);
			oldPolyArray = drawingPolyArray;
			drawingPolyArray = polyArray;
			
			for (var i=0; i < drawingPolyArray.length; i++)
			{
				if ( drawingPolyArray[i] != null )
					map.addOverlay(drawingPolyArray[i]);
			}
		}
		
		function clearOldMarkers()
		{
			if ( oldPolyArray != null )
			{
				for (var i=0; i < oldPolyArray.length; i++)
				{
					if ( oldPolyArray[i] != null )
						map.removeOverlay(oldPolyArray[i]);
				}
			}
		}