var XMLHttpRequestObject = false; 

if (window.XMLHttpRequest) {
    XMLHttpRequestObject = new XMLHttpRequest();
} else if (window.ActiveXObject) {
    XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
}
function getData(dataSource, divID) { 
    if(XMLHttpRequestObject) {
        var obj = document.getElementById(divID); 
        XMLHttpRequestObject.open("GET", dataSource); 
        XMLHttpRequestObject.onreadystatechange = function() { 
            if (XMLHttpRequestObject.readyState == 4) {
		obj.innerHTML = XMLHttpRequestObject.responseText;
		document.getElementById('mydata').innerHTML = "";
		document.getElementById('mydata').className = "mydata_blank";
            } 
        }
        XMLHttpRequestObject.send(null); 
    }
}