var newWindow = null;
	
function openWin(link, width, height, x, y)
{
	if (newWindow == null || newWindow.closed)
	{
		if (navigator.appName.indexOf("Microsoft") >= 0)
			Extras = ',left=' + x + ',top=' + y;
		else
			Extras = ',screenX=' + x + ',screenY=' + y;

  		newWindow = window.open(link, '', 'toolbar=no,location=no,directories=no,menubar=no,scrollbars=yes,width=' + width + ',height=' + height + Extras);
	}	
	else
	{
		newWindow.location = link;
		newWindow.focus();
	}
	return false;
}