function DoAjax(meth,qString,postdata,RequestId) {
        var httpRequest;
        var DataPacket;
        if (window.XMLHttpRequest) { // Mozilla, Safari, ...
            httpRequest = new XMLHttpRequest();
            if (httpRequest.overrideMimeType) {
                httpRequest.overrideMimeType('text/xml');
                // See note below about this line
            }
        } 
        else if (window.ActiveXObject) { // IE
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
            } 
            catch (e) {
                try {
                    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                } 
                catch (e) {}
            }
        }

        if (!httpRequest) {
            alert('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }
        httpRequest.onreadystatechange = function() { 
        if (httpRequest.readyState == 4) {
            if (httpRequest.status == 200) {
                ResponseHandler(httpRequest.responseText,RequestId);
            } else {
                alert('There was a problem with the request.');
            }
        }
        
        };
        httpRequest.open(meth,qString, true);
        if(meth=='POST'){
	        httpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
            httpRequest.send(postdata); 
        }else{
        httpRequest.send('');
        }
}