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;
}