function displayWin(url) 
{ 
	LeftPosition = (screen.width) ? (screen.width-640)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-480)/2 : 0;

	var Win = window.open(url,"displayWindow",'width=640,height=480,resizable=no,scrollbars=no,menubar=no');
}

function zoom()
{
}

function zoom_image(url)
{
	var obraz = url;
	var url = "../zoom_image.php?img=" + obraz;
	displayWin(url);
}