日期:2014-05-16  浏览次数:20487 次

鼠标滑过背景变色的一个效果修改
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style>
#holder li.current{
background-color:#000000
}  
#holder li {
padding: 14px 16px;
float: left;
}
</style>
</head>
<body>
<div id="holder">
  <ul><li>aaa</li></ul>
  <ul><li>aaa</li></ul>
</div>

  <script type="text/javascript">  
var holder = document.getElementById("holder");  
var td = holder.getElementsByTagName("li");  
for(var i = 0; i < td.length; i++){  
  var obj = td[i];  
  obj.onmouseover = function(){this.className = "current";};  
  obj.onmouseout = function(){this.className = "";};  
}  
</script>  

</body>
</html>




上面这段代码是一个鼠标滑过背景变色的效果,但是只能用id控制(id="holder"),能不能修改为class的,因为页面好多地方要用同一个效果

我菜鸟,求详细方法

------解决方案--------------------
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style>
.holder li.current{
background-color:#000000
}
.holder li {
padding: 14px 16px;
float: left;
}
</style>
</head>
<body>
<div class="holder">
<ul><li>aaa</li></ul>
<ul><li>aaa</li></ul>
</div>

<script type="text/javascript">
var holder = document.getElementsByClassName("holder")[0];
var td = holder.getElementsByTagName("li");
for(var i = 0; i < td.length; i++){
var obj = td[i];
obj.onmouseover = function(){this.className = "current";};
obj.onmouseout = function(){this.className = "";};
}
</script>

</body>
</html>