<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <style type="text/css"> #caidan{ 500px; height:35px; border:1px solid #60f; } .xiang{ 100px; height:35px; text-align:center; line-height:35px; vertical-align:middle; float:left; } </style> </head> <body> <div id="caidan"> <div class="xiang" onMouseOver="huan(this)">首页</div> <div class="xiang" onMouseOver="huan(this)">产品中心</div> <div class="xiang" onMouseOver="huan(this)">服务中心</div> <div class="xiang" onMouseOver="huan(this)">联系我们</div> </div> </body> <script type="text/javascript"> /*-------------------以后常用-----下面的------------------------*/ function huan(a) { //将所有的項回复原样式 var d=document.getElementsByClassName("xiang"); for(var i=0;i<d.length;i++) { d[i].style.backgroundColor="white"; d[i].style.color="black"; } //换该元素的样式 鼠标移上去换色 a.style.backgroundColor="red"; a.style.color ="white"; // } <!-------------------第二种方式也可以实现效果--------------------------------------> /*<div id="caidan"> <div class="xiang" onMouseOver="huan(this)" onMouseOut="huifu(this)">首页</div> <div class="xiang" onMouseOver="huan(this)" onMouseOut="huifu(this)">产品中心</div> <div class="xiang" onMouseOver="huan(this)" onMouseOut="huifu(this)">服务中心</div> <div class="xiang" onMouseOver="huan(this)" onMouseOut="huifu(this)">联系我们</div> </div> function huifu(a) { a.style.backgroundColor="white";//文字是黑色 a.style.color="white"; }*/ </script> </html>