<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> 使用javascript通过className来获取元素 </title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
</head>
<style>
.red{
color: #F00;
}
#black{
color: #000;
}
</style>
<body>
<script type="text/javascript">
//获得id
function $(id){
return document.getElementById(id);
}
//获得class
function getElementsByClassName(n) {
var classElements = [], allElements = document.getElementsByTagName('*');
for (var i=0; i< allElements.length; i++ )
{
if (allElements[i].className == n ) {
classElements[classElements.length] = allElements[i];
}
}
return classElements;
}
//隐藏艾它社区
function red_hidden(){
var redClassElements = getElementsByClassName('red');
for (var i=0; i<redClassElements.length; i++) {
redClassElements[i].style.display = "none";
}
}
//显示艾它社区
function red_show(){
var redClassElements = getElementsByClassName('red');
for (var i=0; i<redClassElements.length; i++) {
redClassElements[i].style.display = "";
}
}
</script>
<a href="#" onmouseover="red_hidden()" onmouseout="red_show()">点我隐藏红色</a>
<div class="red">艾它社区</div>
<div class="red">艾它社区</div>
<div class="red">艾它社区</div>
<div>***************************************************************</div>
<body>
</html>
