var popwin = null;

function popUpW(urlval,thiswidth,thisheight)
{

	if (!popwin || popwin.closed) {
		popwin = window.open(urlval , "popwin", "top=75,left=75,scrollbars=yes,status=no,resizable=yes,width=" + thiswidth + ",height=" + thisheight);
	} else {
		popwin.width=thiswidth;
		popwin.height=thisheight;
		popwin.document.location = urlval;
	} // end check that window is already open

	popwin.focus();

	return false;
}