function requestToolData() {
	var loading_message = "<br /><span class=\"title_orange\">Loading...</span><br /><br />";

	var timespan = document.getElementById("wf_TimeSpan").value;
	var ctr = document.getElementById("wf_PageCTR").value;
	var imp = document.getElementById("wf_Pageimpressions").value;
	var cpc = document.getElementById("wf_CostPerClick").value;
	
	var oXmlHttp = zXmlHttp.createRequest();
	document.getElementById("divToolData").innerHTML = loading_message;

	oXmlHttp.open("get", "adsense-prof-ajx.php?timespan=" + timespan+ "&ctr=" + ctr+ "&imp="+imp+ "&cpc="+cpc, true);

	oXmlHttp.onreadystatechange = function () {
		if (oXmlHttp.readyState == 4) {
			if (oXmlHttp.status == 200) {
				displayToolData(oXmlHttp.responseText);
			} else {
				displayToolData("An error occurred: " + oXmlHttp.statusText); //statusText is not always accurate
			}
		}            
	};
	oXmlHttp.send(null);
}
        
function displayToolData(sText) {
	var divToolData = document.getElementById("divToolData");
	divToolData.innerHTML = sText;
}