function showPopup(url,awidth,aheight,winname)
{
	if(!awidth) awidth=600;
	if(!aheight) aheight=600;
	var isScrollbar='no';
	if(winname) isScrollbar='yes';
	awin=window.open(url,winname,"leftmargin=0, topmargin=0, rightmargin=0, bottommargin=0, toolbar=no, width="+(awidth+20)+", height="+(aheight+20)+", status=no, scrollbars="+isScrollbar+", resizable="+isScrollbar+", menubar=no, screenX=200, screenY=0");
	awin.document.focus();
}