var http_request = false;
function makeobj(){
    http_request = false;
    if (window.XMLHttpRequest) { // Mozilla, Safari,...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
        
           // http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
        }
    }
    else 
        if (window.ActiveXObject) { // IE
            try {
                http_request = new ActiveXObject("Msxml2.XMLHTTP");
            } 
            catch (e) {
                try {
                    http_request = new ActiveXObject("Microsoft.XMLHTTP");
                } 
                catch (e) {
                }
            }
        }
    if (!http_request) {
        alert('Cannot create XMLHTTP instance');
        return false;
    }
}