trycss_opa_2 在线代码实例

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<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>编程狮(w3cschool.cn)</title>
    <style>
        div{
            width:100px;
            height:100px;
            background-color:red}
    </style>
    <script>
        window.onload =function(){
        var myDiv = document.getElementById("transparent_div");
        myDiv.onclick =function(){
            myDiv.style.opacity =".4";//针对所有通用浏览器
            myDiv.style.filter ="alpha(opacity=40)";//针对IE浏览器
            }
        }
    </script>
<body>
       <div id="transparent_div">this istransparent div</div>
</body>
 
 
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运行结果
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