function showHeatMap(theYear) {
   var kmlFile = "http://www.geospatialtraining.com/Wildfiredata/CaliforniaHeat" + theYear.toString() + ".kml";
   exml = new EGeoXml("exml", map, kmlFile);
   exml.parse();
   
   var sOverlay = new GScreenOverlay("heatlegend.png",new GScreenPoint(100, 100, 'pixel','pixel'), new GScreenPoint(0, 0, 'fraction', 'fraction'), new GScreenSize(165, 121, 'pixel','pixel')); 
   map.addOverlay(sOverlay);
   
   var currentLat = parseInt(map.getCenter().lat());
   var currentLong = parseInt(map.getCenter().lng());
   
   if (currentLat != 37 && currentLong != -119)
   {
	map.setCenter(new GLatLng(36.932842, -119.786686),5);
   }
}

function clearHeatMap() {
   map.clearOverlays();
   updateFirePoints();
}

function animateHeatMap() {
   if ((dijit.byId("numTxtTimeDelay").value >= 3) && (dijit.byId("numTxtTimeDelay").value <= 10)) {
	setTimeout('cycleHeatMap()',1000);
   }
}

function cycleHeatMap() {
   var theYear = aYears[cntr];
   
   if (theYear < 2008) {
      showHeatMap(theYear);	     
      displayMessage("infoDivHeat", "Displaying California wildfire heat map for the year: " + theYear.toString() + "<p><img src='progressBar.gif' />");
      cntr += 1;
      setTimeout('cycleHeatMap()',dijit.byId("numTxtTimeDelay").value * 1000);
   }
   else {
	displayMessage("infoDivHeat", "");
	cntr = 0;
   }
}