function openWin(i, t) {
	var myWin; 
	if (!myWin || myWin.closed) { 
		myWin = window.open('show.php?i='+i+'&t='+t,
			"blank",
			"width=456,height=342,"+
			"toolbar=0,location=0,"+
			"directories=0,status=0,"+
			"menubar=0,scrollbars=0,"+
			"resizable=0,"+
			"top="+((screen.height/2)-171)+","+
			"left="+((screen.width/2)-228));
	} else {
		myWin.focus();
	} 
}