function toggle_link(url,timer) 
{
	for (var i=0; i < document.links.length; i++)
	{
		document.links[i].href = document.links[i].href.replace(/start/,"stop");
		
		if ((url) == document.links[i].href && url.match("start"))
		{
			document.links[i].href = document.links[i].href.replace(/start/,"stop");
			clearTimeout(baiyun);
		}
		else if ((url) == document.links[i].href && url.match("stop"))
		{
			document.links[i].href = document.links[i].href.replace(/stop/,"start");
			baiyun = setTimeout('document.links[\'' + i + '\'].href = document.links[\'' + i + '\'].href.replace(/start/,"stop")', timer);
		}
	}
}