How to send a xmlhttprequest of a specific part of the retrieved HTML header data.
<script type= "Text/javascript" >
var xmlhttp;
function Loadxmldoc (URL)
{
Xmlhttp=null;
if (window. XMLHttpRequest)
{//All modern browsers
Xmlhttp=new XMLHttpRequest ();
}
else if (window. ActiveXObject)
{//For IE5, IE6
Xmlhttp=new ActiveXObject ("Microsoft.XMLHTTP");
}
if (xmlhttp!=null)
{
Xmlhttp.onreadystatechange=state_change;
Xmlhttp.open ("Get", url,true);
Xmlhttp.send (NULL);
}
Else
{
Alert ("Your browser does not support XMLHTTP.");
}
}
function State_change ()
{
if (xmlhttp.readystate==4)
{//4 = "Loaded"
if (xmlhttp.status==200)
{//= "OK"
document.getElementById (' P1 '). innerhtml= "This file is last modified on:" + xmlhttp.getresponseheader (' last-modified ' );
}
Else
{
Alert ("Problem Retrieving Data:" + Xmlhttp.statustext);
}
}
}
</script>
<body>
<p id= "P1" >
The getResponseHeader () function returns the resource for a header. Title contains file information such as length, server type, content type, date modification, etc. .</p>
<button onclick= "Loadxmldoc (' Test_xmlhttp.txt ')" >get "Last-modified" </button>
</body>
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