xml=new ActiveXObject('Microsoft.XMLHTTP')出错_html/css_WEB-ITnose

I am writing a js script, I write like this
xml=new ActiveXObject("Microsoft.XMLHTTP");
xml.open("GET","http://xxx/test.asp ",false);
xml.send();
Why is this sentence skipped directly when debugging with firbug?

Reply to discussion (solution)

firbug? Use xml=new XMLHttpRequest(); under firefox;

if(window.XMLHttpRequest){ xml=new ActiveXObject("Microsoft.XMLHTTP");}else{   xml=new XMLHttpRequest();}xml.open("GET","http://xxx/test.asp",false);xml.send(); 

firbug ?In firefox, use xml=new XMLHttpRequest();

if(window.XMLHttpRequest){ xml=new ActiveXObject("Microsoft.XMLHTTP");}else{   xml=new XMLHttpRequest();}xml.open("GET","http://xxx/test.asp",false);xml.send(); 

This is correct, why did send go wrong again?

function GetLocalIPAdress(){	if(window.ActiveXObject)	{		xml=new ActiveXObject("Microsoft.XMLHTTP");	}else	{		xml=new XMLHttpRequest();	}	xml.open("GET","http://iframe.ip138.com/ic.asp",false);	xml.send(null);	kk=xml.ResponseText;	alert(kk);	i=kk.indexOf("[");	ie=kk.indexOf("]");	ip=kk.substring(i+1,ie);	alert(ip);	return ip;}

iframe.ip138.com is not your domain and cannot be cross-domain

iframe.ip138.com is not your domain and cannot be cross-domain
Then How can I request this ip address?

iframe.ip138.com is not your domain and cannot be cross-domain
Then how can I request this IP address?

<script type='text/javascript' src='http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js'></script> <script>    function getIp(){        $.getScript(          'http://pv.sohu.com/cityjson' ,function(){           alert( 	 returnCitySN.cip +':' + returnCitySN.cname )          } )    }   getIp();</script>