function show(filename)
{
	rooturl = new String(document.links[2])	//use url of root/contact.htm to compute relative address of download folder.
	newlink = rooturl.substring(0,rooturl.length-11) + "dl-tech.asp?id=" + filename
	winobj = window.open(newlink,"extra","toolbar=1,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,Width=750,Height=550");
		winobj.focus();

}