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;
}