function enlarge(file, w, h){

	var strConfig = "toolbar=no,location=no,directories=no,titlebar=no,status=yes,menubar=0,resizable=1,";
	if (screen.height > h)
	{
		width = w;
		height = h;
		margin_top = 30; // center popup windows
		margin_left = (screen.width - w)/2;
		strConfig += "scrollbars=0,";
	}
	else {
		width= screen.width;
		height = screen.height;
		margin_top = 0;
		margin_left = 0;
		strConfig += "fullscreen=yes,scrollbars=1,";
	}
	strConfig += "left=" + margin_left + ",top=" + margin_top + ",width=" + width + ",height=" + height;
	window.open('enlarge_pic.aspx?pic=' + file,'',strConfig);
}