var subwin;
	
	function popUpImageKill()
	{
		if (typeof(subwin)=='undefined')
			return;
		if (typeof(subwin.closed)=='undefined')
			return;
		if (subwin.closed==true)
			return;
		subwin.close();
	}

	function popUpImage(href,width,height)
	{
		
		swleft = Math.round((self.screen.width - width)/2);
    	swtop  = Math.round((self.screen.height - height)/3);
		subwin = window.open(href,"","height="+height+",width="+width+", left = "+swleft+", top = "+swtop+", toolbar=no, menubar=no, scrollbars=no, resizable=no, location=no, directories=no, status=no");
		
		return false;
	}