function gShowBigImage(img_src) {
		var bThumb = document.getElementById("bigThumb");
		if(bThumb.src != img_src.src) {
			bThumb.src = img_src.src;
		}
	}
	
		function OpenPreview(page, width, height) 
	{
		if(navigator.appName == "Microsoft Internet Explorer") 
		{
			screenY = document.body.offsetHeight;
			screenX = window.screen.availWidth;
		}
		else 
		{
			screenY = window.outerHeight
			screenX = window.outerWidth
		}
	
		var theTop=(screenY/2)-(height/2);
		var theLeft=(screenX/2)-(width/2);
	
		var prop = "width=" + width + ",height=" + height + ",scrollbars=no,resizable=no,left=" + theLeft + ",top=" + theTop;
		OpenWin = this.open(page, "ImagePreview", prop);
	}

	function OpenPreviewScroll(page, width, height) 
	{
		if(navigator.appName == "Microsoft Internet Explorer") 
		{
			screenY = document.body.offsetHeight;
			screenX = window.screen.availWidth;
		}
		else 
		{
			screenY = window.outerHeight
			screenX = window.outerWidth
		}
	
		var theTop=(screenY/2)-(height/2);
		var theLeft=(screenX/2)-(width/2);
	
		var prop = "width=" + width + ",height=" + height + ",scrollbars=yes,resizable=yes,left=" + theLeft + ",top=" + theTop;
		OpenWin = this.open(page, "ImagePreview", prop);
	}