var xmlHttp;
function createXMLHttpRequest() {
       if (window.ActiveXObject) {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
       }
       else if (window.XMLHttpRequest) {
            xmlHttp = new XMLHttpRequest();
       }
}

function handleStateChange() {
	if(xmlHttp.readyState == 4) {
		if(xmlHttp.status == 200) {
	    	parseResults();
	    }
	}
}