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function createXMLHttp(){
var request;

var browser=navigator.appName;

if(browser=="Microsoft Internet Explorer"){
request=new ActiveXObject("Microsoft.XMLHttp");
return request;
}else{
request=new XMLHttpRequest();
return request;
}
}

var xhr=createXMLHttp();
function HelloSunYang(){
var url="servlet/Hello.do?name=" + document.forms[0].name.value;
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alert(url);
xhr.open("GET",url,true);
xhr.onreadystatechange=getHello ;
xhr.send();

}
function getHello(){
//panduan XMLHttpRequest zhuangtai
if(xhr.readyState==4){
//shezhibianliang helloStr dezhi
var helloStr=xhr.responseText;
alert(helloStr);
document.getElementById("hello").innerHTML=helloStr;
}
}
</script>


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