function getXhr(){
var xhr=null;
if(window.XMLHttpRequest){
xhr=new XMLHttpRequest();
}else{
xhr=new ActiveXObject('Microsoft.XMLHttp');
}
return xhr;
}
var xhr=getXhr();
function getXhr(){
var xhr=null;
if(window.XMLHttpRequest){
xhr=new XMLHttpRequest();
}else{
xhr=new ActiveXObject('Microsoft.XMLHttp');
}
return xhr;
}
var xhr=getXhr();
