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var xmlhttp = null ;
function getxml()
{
try
{
xmlhttp = new XMLHttpRequest();
}
catch(e)
{
try
{
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e)
{
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
}
}
return xmlhttp;
}
function check()
{
var rolename = document.getElementById("rolename").value;
alert(rolename);
xmlhttp = getxml();
if(xmlhttp)
{
alert ("ok");
xmlhttp.open("GET","ajax.aspx?rolename="+escape(rolename),true);
alert("op()");
xmlhttp.onreadystatechange = callback;
xmlhttp.send(null);
}
else
{
alert ("xmlhttp lost");
}
}
function callback()
{
alert("callback");
alert(xmlhttp.readystate);
if(xmlhttp.readystate ==4)
{
alert("rr");
if(xmlhttp.status ==200)
{
alert("gggg");
var nn = xmlhttp.responseText;
alert(nn);
}
}
}