function httpRequest(strURL, returnFunction) {
	if(!returnFunction)
		returnFunction = '';
		
	var xmlHttpReq = false;
	
	// Mozilla/Safari
	if (window.XMLHttpRequest) {
	    xmlHttpReq = new XMLHttpRequest();
	    if (xmlHttpReq.overrideMimeType) {
	        xmlHttpReq.overrideMimeType('text/xml');
	    }
	// IE
	} else if (window.ActiveXObject) { // IE
	    try {
	        xmlHttpReq = new ActiveXObject("Msxml2.XMLHTTP");
	} catch (e) {
	    try {
	        xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
	    } catch (e) {}
	    }
	}
	
	if (!xmlHttpReq) {
		//alert('ERROR AJAX:( Cannot create an XMLHTTP instance');
		return false;
	}
	
	   xmlHttpReq.open('GET', strURL, true);
	   xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');        
	  	xmlHttpReq.onreadystatechange = function() {
			if (xmlHttpReq.readyState == 4) {
			    if (xmlHttpReq.status == 200) {
			        var responseString = xmlHttpReq.responseText;
					if(returnFunction != '')
						eval(returnFunction + '(responseString)'); 
			    } else {
			        //alert('ERROR: AJAX request status = ' + xmlHttpReq.status);
			    }
			}
	   }
	   xmlHttpReq.send("");
}