<html>
<body>
<object id="myObject"
classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
codebase="http://download.macromedia.ru/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0"
width="243"
height="194">
<param id="myP1"
name=movie
value="yourflashmovie.swf"
valuetype="ref"
type="video/*">
<param id="myP2"
value=high
name=quality>
</object>
<script language="JavaScript">
function function1() {
var m = document.all.myObject.BaseHref;
alert(m);
}
</script>
<input type="button" value="The current document"s full URL" onClick="function1();">
</body>
</html>