//在这里加入一个函数，判断IE版本是否大于等于5.5
function getBrowerVersion() {
	var verStart=navigator.appVersion.indexOf("MSIE") + 5
	var verEnd=navigator.appVersion.indexOf(";",verStart)
	if (navigator.appVersion.substring(verStart, verEnd) >= "5.5") {
	return(true)
	} else {
	return(false)
	}
}


function getHTTPXML(url)
{
	var strData = "action=isign";
	var xmlhttp = jb();
	xmlhttp.open("get", url, false);
	xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded")
	xmlhttp.send(strData);
	if (getBrowerVersion() || xmlhttp=='[object XMLHttpRequest]' ){
	//不用解码
		return xmlhttp.responseText;	
	}
	else
	{
		//解码，否则会乱码的

		return bytes2BSTR(xmlhttp.responseBody);
	}
}
	
	
function jb() 
{ 
	var A=null; 
	try 
	{ 
		A=new ActiveXObject("Msxml2.XMLHTTP") 
	} 
	catch(e) 
	{ 
		try 
		{ 
			A=new ActiveXObject("Microsoft.XMLHTTP") 
		} 
		catch(oc)
		{ 
			A=null ;
		} 
	} 
	if ( !A && typeof XMLHttpRequest != "undefined" ) 
	{ 
		A=new XMLHttpRequest() ;
	} 
	return A ;
}