function ajaxInit() {
var xmlhttp;
try { 
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); 
} catch (e) { 
try { 
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); 
} catch (E) { 
xmlhttp = false; 
} 
} 
if  (!xmlhttp && typeof  XMLHttpRequest != 'undefined' ) { 
try  { 
xmlhttp = new  XMLHttpRequest(); 
} catch  (e) { 
xmlhttp = false ; 
} 
}
return xmlhttp;
}