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js related ban

高洛峰Original: 2016-10-15 17:47:101231browse

遇到网页上有精美图片或者精彩文字想保存时，通常大家都是选中目标后按鼠标右键，在弹出菜单中选择“图片另存为”或“复制”来达到我们的目的。但是，目前有许多网页都屏蔽了鼠标右键，那么用js如何实现禁止鼠标右键的功能呢？

1.与禁止鼠标右键相关的JS说明

 <script type="text/javascript">
     document.oncontextmenu=new Function("event.returnValue=false;");
     document.onselectstart=new Function("event.returnValue=false;");
 </script>

2.禁止鼠标右键火狐失灵

<!DOCTYPE html>
<html>
<head>
    <title>禁止鼠标右键</title>
    <meta charset="utf-8">
</head>
<body>
    <div class="poo">这个页面不能使用鼠标右键</div>
    <!-- 禁止鼠标右键 -->
    <script type="text/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>  
</body>
</html>

3.禁止选择文本

<script type="text/javascript">
    var omitformtags=["input", "textarea", "select"];
    omitformtagsomitformtags=omitformtags.join("|");
    function disableselect(e){
        if (omitformtags.indexOf(e.target.tagName.toLowerCase())==-1){
            return false;
        }
    }

    function reEnable(){
        return true;
    }

    if (typeof document.onselectstart!="undefined"){
        document.onselectstart=new Function ("return false");
    }else{
        document.onmousedown=disableselect;
        document.onmouseup=reEnable;
    }

</script>

4.屏蔽ctrl按键

document.onkeydown=function(){
if(event.ctrlKey)return false;
}

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