JavaScript Tutorial/Document/URL
document.URL
The URL property specifies the URL of the document.
This property is read-only.
<HTML>
<head>
<title>this is a title</title>
</head>
<BODY bgcolor="beige" text= "black" link="darkblue" vlink="honeydew">
<SCRIPT language="JavaScript">
<!--
document.write("URL: "+document.URL);
//-->
</SCRIPT>
</BODY>
</HTML>