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JavaScript禁止页面操作的示例代码

时间：2021-01-20 23:43 编辑：来源：阅读：
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摘要：JavaScript禁止页面操作的示例代码

单的JS禁止页面右键菜单--避免网站信息被盗用

<script type="text/javascript">
  function block(oEvent){
   if(window.event)
    oEvent=window.event;
   if(oEvent.button==2)
    alert("鼠标右键不可用");
  }
  document.onmousedown=block;
</script>

网页上禁止复制主要靠JavaScript来实现。 <BODY oncontextmenu="return false" onselectstart="return false" ondragstart="return false" onbeforecopy="return false" oncopy=document.selection.empty() onselect=document.selection.empty()> ----------------------------------------------- 防止复制的js -----------------------------------------------

[u]复制代码[/u] 代码如下:

<SCRIPT language=JavaScript1.2>
function disableselect(e){
return false}
function reEnable(){return true
}
file://if IE4+
document.onselectstart=new Function ("return false")
file://if NS6
if (window.sidebar){
document.onmousedown=disableselect
document.onclick=reEnable
}
</SCRIPT>
<SCRIPT language=JavaScript type=text/JavaScript>
<!--
function MM_reloadPage(init) {    //reloads the window if Nav4 resized
    if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
      document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
    else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);
//-->
</SCRIPT>

------------------------------------------------------- 防止下载的js ------------------------------------------------------- <noscript><iframe src=""></iframe></noscript> -------------------------------------------------------- 下面是防止右键的js:

[u]复制代码[/u] 代码如下:

<script language="JavaScript">
<!--
if (window.Event)
document.captureEvents(Event.MOUSEUP);
function nocontextmenu() {
event.cancelBubble = true
event.returnValue = false;
return false;
}
function norightclick(e) {
if (window.Event){
   if (e.which == 2 || e.which == 3)
   return false;
}else{
   if (event.button == 2 || event.button == 3){
       event.cancelBubble = true
    event.returnValue = false;
       return false;
    }
}
}

document.oncontextmenu = nocontextmenu; // for IE5+
document.onmousedown = norightclick; // for all others
//-->
</script>

<title>CSS禁止选择和复制</title>
<meta http-equiv="content-Type" content="text/html;charset=gb2312">
<style>
body{
 -moz-user-select:none;
 hutia:expression(this.onselectstart=function(){return(false)});
}
</style>
</head>
<body>
这里是网页内容，试试您能不能复制？
</body>
</html>

应用实例：

[u]复制代码[/u] 代码如下:

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>JS控制页面</title>
    <script language="javascript" type="text/javascript">
        //禁止用户使用邮件（隐藏右键菜单）
        document.oncontextmenu = function forbidRightKey() {
            window.event.returnValue = false;
         }
         //禁止用户使用邮件（提示用户禁用右键）
         function block() {
             var oEvent;
             if (window.event)
                 oEvent = window.event;
             if (oEvent.button == 2)
                 alert("鼠标右键不可用");
         }
         document.onmousedown = block;

        //当用户按键AltF4的时候，提示关闭窗口信息
        function altF4() {
            if (window.event.altKey && window.event.keyCode == 115) {
                  window.close();
            }
        }
        //alt 鼠标左键 组成快捷键 选中文本框中内容 调用方式<body onkeydown="altF4();" >
        function getTxtSelect(eventControl) {
            if (eventControl.altKey) {
                document.getElementById("txt1").select();
            }
        }
        function clearTxtByInput() {
            document.getElementById("txtContent").value = "";
        }

        function FillTxtByInput() {
            document.getElementById("txtContent").value = "输入搜索条件";
        }
        //禁用键盘上的某几个键 调用onkeydown="ForbidKeys();"
        function ForbidKeys() {
            var content = window.event.keyCode;
            if (content >= 65 && content <= 68) {
                window.event.returnValue = false;
            } else {
                window.alert(content);
            }
        }

        //禁止复制网页内容 <body oncopy="forbidCopy();">
         function forbidCopy() {
            window.event.returnValue = false;
            window.clipboardData.setData("Text", "");
            alert("禁止复制网页内容！");
        }

        //设置复制内容 附加 本网站的URL
        function SetCopyContent() {
            window.event.returnValue = false;
            var content = document.title + "/r/n";
            content += document.getElementById("txt1").value + "/r/n";
            content += "本资源来自 " + this.location.href;
            window.clipboardData.setData('Text', content);
            alert("复制成功，请粘贴到你的QQ/MSN上推荐给你的好友");
        }

        //禁止刷新F5 和Ctrl+F5
        function ForbidFreshPage() {

            if ((window.event.ctrlKey && window.event.keyCode == 116) || window.event.keyCode == 116) {
               window.event.keyCode = 0;
               window.event.returnValue = false;
           }
        }
        document.onkeydown = ForbidFreshPage;
        //屏蔽JS错误
        function killErrors() {
            return true;
        }
        window.onerror = killErrors;

       
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <input id="txt1" type="text" value="Hello World!"  onclick="getTxtSelect(event)"/>
        <input type="button" value="复制文本框中的值"  onclick="SetCopyContent();" />
        <input id="txtContent" value="输入搜索条件" style="color:Aqua" onclick="clearTxtByInput();"  onblur="FillTxtByInput();" />
        <p>content</p>

    </div>
    </form>
</body>
</html>

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