function GetAjax(){
	var ajax = false; 
    try { 
    	ajax = new ActiveXObject("Msxml2.XMLHTTP"); //IE7.0+
    } catch (e) { 
   	 	try { 
    		ajax = new ActiveXObject("Microsoft.XMLHTTP"); //IE6.0-
    	} catch (E) { 
    		ajax = false; 
    	} 
    }
    if (!ajax && typeof XMLHttpRequest != 'undefined') { 
    	ajax = new XMLHttpRequest(); 
    } 
    return ajax;
}