本文实例讲述了JS实现兼容火狐及IE iframe onload属性的遮罩层隐藏及显示效果。分享给大家供大家参考，具体如下：
<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title></title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<style type="text/css">
<!--
#Layer1 {
position: absolute;
width: 896px;
height: 472px;
z-index: 1;
left: 97px;
top: 120px;
}
#Layer2 {
position: absolute;
width: 127px;
height: 86px;
z-index: 2;
left: 1159px;
top: 240px;
}
#Layer3 {
position: absolute;
width: 200px;
height: 115px;
z-index: 3;
left: 404px;
top: 160px;
}
body {
background-image: url(lib/images/index111.jpg);
margin-left: -10px;
}
.input_image{border:0px solid #808080; background-color:#006699;}
-->
</style>
</head>
<body leftmargin="0" topmargin="0" marginwidth="0" marginheight="0" oncontextmenu="return false" ondragstart="return false" onselectstart ="return false" onselect="document.selection.empty()" oncopy="document.selection.empty()" onbeforecopy="return false" onmouseup="document.selection.empty()" >
<div id="Layer3">
<img src="/UploadFiles/2021-04-02/welcome33.gif">
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希望本文所述对大家JavaScript程序设计有所帮助。