var http;

function Createhttp()
{
    try {
	http = new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch(e) {
	try {
	    http = new ActiveXObject("Microsoft.XMLHTTP");
	}
	catch(oc) {
	    http = null;
	}
    }

    if (!http && typeof XMLHttpRequest != "undefined") {
	http = new XMLHttpRequest();
    }

}