点击变化图象 不错

<base href="http://bbs.blueidea.com/"> <img id="pic1" onClick="alert(document.images.pic1.src);document.images.pic1.src=document.images.pic1.src.indexOf('images/blue/logo.gif')>=0?'http://img.gxlcms.com/images/blue/newtopic.gif':'images/blue/logo.gif'" src="http://img.gxlcms.com/images/blue/newtopic.gif"/>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]