if(typeof window.addEventListener != 'undefined')
{
	//.. gecko, safari, konqueror and standard
	window.addEventListener('load', adsense_init, false);
}
else if(typeof document.addEventListener != 'undefined')
{
	//.. opera 7
	document.addEventListener('load', adsense_init, false);
}
else if(typeof window.attachEvent != 'undefined')
{
	//.. win/ie
	window.attachEvent('onload', adsense_init);
}
//** remove this condition to degrade older browsers
else
{
	//.. mac/ie5 and anything else that gets this far

	//if there's an existing onload function
	if(typeof window.onload == 'function')
	{
		//store it
		var existing = onload;

		//add new onload handler
		window.onload = function()
		{
			//call existing onload function
			existing();

			//call adsense_init onload function
			adsense_init();
		};
	}
	else
	{
		//setup onload function
		window.onload = adsense_init;
	}
}

function adsense_init () {

	if (document.all) {  //ie

		var iframeElements = document.getElementsByTagName("iframe");
	
		for(var i = 0; i < iframeElements.length; i++) {
			if(iframeElements[i].src.indexOf('googlesyndication.com') > -1) {
				adUnit = i+1;
				browser = "IE";
				adunitsize = iframeElements[i].width + "x" + iframeElements[i].height;
				iframeElements[i].onfocus = trackAdsense;
			}
		}
	
	} else {   // firefox
	
		window.addEventListener('beforeunload', doPageExit, false);
		window.addEventListener('mousemove', getMouse, true);
	
	}
		
}

//for firefox
var px;
var py;
var adUnit = "";
var browser = "";
var adunitsize = "";

function getMouse(e) {
	px=e.pageX;
	py=e.clientY;
}

function findY(obj) {
	var y = 0;
	while (obj) {
		y += obj.offsetTop;
		obj = obj.offsetParent;
	}
	return(y);
}

function findX(obj) {
	var x = 0;
	while (obj) {
		x += obj.offsetLeft;
		obj = obj.offsetParent;
	}
	return(x);
}

function doPageExit(e) {

	ad = document.getElementsByTagName("iframe");
	for (i=0; i<ad.length; i++) {
		var adLeft = findX(ad[i]);
		var adTop = findY(ad[i]);
		var inFrameX = (px > (adLeft - 10) && px < (parseInt(adLeft) + parseInt(ad[i].width) + 15));
		var inFrameY = (py > (adTop - 10) && py < (parseInt(adTop) + parseInt(ad[i].height) + 10));
		
		if (inFrameY && inFrameX) {
			adUnit = i+1;
			browser = "Firefox";
			adunitsize = ad[i].width + "x" + ad[i].height;
			trackAdsense();
		
		}
	}

}
//end for firefox

function trackAdsense() {
	var path = 'http://www.blogdigger.com/clickTrack';
	
	// can't use encodeURIComponent everywhere. escape() should work for this scenario
	path += "?from_title="+escape(document.title);
	path += "&from="+escape(self.location);
	path += "&unit="+escape(adUnit);
	path += "&browser="+escape(browser);
	path += "&adunitsize="+escape(adunitsize);
	
	var data = false;
	/*@cc_on @*/
	/*@if (@_jscript_version >= 5)
	try { data = new ActiveXObject("Msxml2.XMLHTTP"); } 
	catch (e) { try { data = new ActiveXObject("Microsoft.XMLHTTP"); } catch (E) { data = false; } }
	@end @*/
	if (!data && typeof XMLHttpRequest!='undefined') data = new XMLHttpRequest();
	if (data) data.open("GET", path, false); data.send(null);
}