不知道你见过没有，这个特效是把网页中图片的默认alt的提示去掉

<img src="http://www.webjx.com/images/logo.gif" alt="网页教学网1号站"> <img src="http://www.webjx.com/images/logo.gif" alt="网页教学网2号站"> <img src="http://www.webjx.com/images/logo.gif" alt="网页教学网3号站"> <div style="visibility:hidden;border:0px solid #000000;background-color:#333333;font-size:12px;color:#6699cc;position:absolute;" id=altlayer></div> <script> document.body.onmousemove=quickalt; function quickalt() { if (event.srcElement.hint)event.srcElement.alt=event.srcElement.hint; if(event.srcElement.alt && event.srcElement.alt!='') { event.srcElement.hint=event.srcElement.alt; altlayer.style.visibility='visible'; altlayer.style.left=event.x-1; altlayer.style.top=event.y+16; altlayer.innerHTML=event.srcElement.hint event.srcElement.alt=""; } else altlayer.style.visibility='hidden';} </script>

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