function GetXmlHttpObject() {
	var xmlHttp=null;

	try {
  		// Firefox, Opera 8.0+, Safari
  		xmlHttp=new XMLHttpRequest();
  	} catch (e) {
  		// Internet Explorer
  		try {
		    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    		} catch (e) {
		    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    		}
  	}
	return xmlHttp;
}