Jeg har lave dette AJAX script:
<body onload="tjeckForWeb()">
<SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript">
<!--
var xmlHttp
function tjeckForWeb()
{
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request")
return
}
var url="
http://www.google.dk/" xmlHttp.open("GET",url,true)
xmlHttp.send(null)
window.setTimeout("hasWeb()",2000)
}
function hasWeb()
{
if(xmlHttp.responseText != "")
alert("Is Online")
else
alert("Is Offline")
}
function GetXmlHttpObject()
{
var objXMLHttp=null
if (window.XMLHttpRequest)
{
objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}
//-->
</SCRIPT>
</body>