var img = new Image();
var newWin;

	function loadImage(fileName, url)
		{
		  this.url = url;
		  img.src = fileName;
		  document.preview.src = img.src;
		}

	function bigImage()
		{
		  newWin = window.open(url,"big","menubar=0,toolbar=0,status=1,resizable=1,scrollbars=1, width=500, height=400");
		}