<script src="http://www.heatmapapi.com/javascript/HeatmapAPI2.aspx?k=(YOUR HEATMAPAPI KEY HERE)" type="text/javascript"></script>

<script src="http://maps.google.com/maps?file=api&v=2&key=(YOUR GOOGLE KEY HERE)" type="text/javascript"></script>

<script src="http://www.heatmapapi.com/javascript/HeatmapAPIGoogle2.js" type="text/javascript"></script>

<!-- Include these two hidden fields on your page -->
<input type="hidden" id="HMMapdata" />
<input type="hidden" name="HMImageURL" id="HMImageURL" />

<script type="text/javascript">
var m = null;
function loadGoogle()
{
 if (GBrowserIsCompatible())
 {
  m = new GMap2(document.getElementById("map"));
  m.addControl(new GLargeMapControl());
  m.addControl(new GMapTypeControl());
  m.setCenter(new GLatLng(39.03, -103.96), 12);
  initHeatmap();
 }
 else
  alert('Your Internet browser is not compatible
    with this website.');
}

setTimeout('loadGoogle()', 1);

function initHeatmap()
{
 // Heatmap Scripts
 try
 {
  var myHM = new GEOHeatmap();
  myHM.Init(400, 300); // Step 1

  // Generate random lat/lon and value points

 for(p=0;p<1000;p++)
 {
  var rLatD=Math.floor(Math.random()*1000);
  var rLonD=Math.floor(Math.random()*1000);
  var rValD=Math.floor(Math.random()*10);
  var sVal = (39+(rLatD/15000)) + "," +
   (-104+(rLonD/15000)) + "," +
    (rValD) + ",";
  d += sVal;
 }
  document.getElementById("HMMapdata").value = d; // Step 2
  myHM.SetBoost(2); // Optional, make it 'smoother n bigger'
  myHM.SetDecay(0); //Optional, slow growth for adjacency

  //NOTE YOU NEED TO CREATE A PAGE LIKE THIS BELOW ON YOUR SITE
  //See the documentation under web services for an example

  var proxyURL = 'http://yourwebsite.com/
    HeatmapGenerateProxy.aspx'; // Optional for cross-domain

  myHM.SetProxyURL(proxyURL); // Step 2b // Optional
                                            // for cross-domain
  var preUrl = myHM.GetURL(); // Step 3

  // Now render in our Google Map
  var heatmapOverlay = new HMGoogleOverlay(preUrl);
  m.addOverlay(heatmapOverlay);
 }
 catch(e)
 {
  alert(e.Message);
 }
}