JavaScript调用WebService

// <!CDATA[
//define
var xmlhttp;
var value=new Array();
var variable=new Array();
//Show Response MSG.
function handleStateChange()
{
var h=document.getElementById("Label1");
if(xmlhttp.readyState==4)
{
if(xmlhttp.status==200)
{
alert(xmlhttp.responseText);
h.innerHTML=xmlhttp.responseText;
//h.innerHTML=xmlhttp.responseXML;
}
else if(xmlhttp.status==404)
{
h.innerHTML="<br>找不到请求的服务器资源！";
}
}
else if(xmlhttp.readyState==0)
{
h.innerHTML="<br>未初始化！";
}
else if(xmlhttp.readyState==1)
{
h.innerHTML="<br>正在加载……！";
}
else if(xmlhttp.readyState==2)
{
h.innerHTML="<br>已经加载完成！";
}
else if(xmlhttp.readyState==3)
{
h.innerHTML="<br>正在和服务器交互";
}
else
{
h.innerHTML=xmlhttp.responseXML;
}

}
//Get Request Data's length
function getlen(str)
{
var bytesCount=0;
for (var i = 0; i < str.length; i++)
{
var c = str.charAt(i);
if (/^[\u0000-\u00ff]$/.test(c)) //匹配双字节
{
bytesCount += 1;
}
else
{
bytesCount += 2;
}
}
return bytesCount;
}

//Create XMLHttpRequest Object
function createXMLHttpRequest()
{
if(window.ActiveXObject)
{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequst)
{
xmlhttp=new XMLHttpRequest();
}
}
//send Request By HTTP POST
function RequestByPost(method,variable,value,url,_Namespace)
{
createXMLHttpRequest();
var data;
data = '<?xml version="1.0" encoding="utf-8"?>';
data = data + '<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">';
data = data + '<soap:Body>';