function popup(a, w, h ) {
	newwin = open( a.href, "new", "status=yes,location=no,menubar=no,scrollbars=no,toolbar=no,titlebar=no" );
	newwin.resizeTo( w,h );
	newwin.moveTo( ( screen.availWidth - w ) / 2 , ( screen.availHeight - h ) / 2 );
	return false;
}