var ImageWindow = new Array();

function PopUpWindow(url, xSize, ySize, idx) {
	var xOffset = (screen.width-xSize)/2;
	var yOffset = (screen.height-ySize)/2;
	ImageWindow[idx] = window.open(url,"ImageWindow"+idx,"width="+xSize+",height="+ySize+",screenX="+xOffset+",screenY="+yOffset+",top="+yOffset+",left="+xOffset+",toolbar=0,location=no,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,fullscreen=0,scrollbar=true");
	ImageWindow[idx].opener = self;
	ImageWindow[idx].focus();
}