function Navigate(oSelect){
	var win2;
	var sPath = "files/";
	var selectedurl = sPath + oSelect.options[oSelect.selectedIndex].value;
	if( document.getElementById )
		// <iframe id="external" style="height:400px;width:600px;" src="help.html"></iframe>
		document.getElementById("external").src = selectedurl
	else if(document.all)
		document.all.external.src=selectedurl
	else{
		if (!window.win2||win2.closed)
			win2=window.open(selectedurl)
			
		else{	// if win2 already exists
			win2.location=selectedurl
			win2.focus()
		}
	}
}