JSCode all of Brower 全局屏蔽网页右键功能 具体实现

[javascript]
代码如下:
<script type="text/javascript">
function clickIE4(){
        if (event.button==2){
                return false;
        }
}

function clickNS4(e){
        if (document.layers||document.getElementById&&!document.all){
                if (e.which==2||e.which==3){
                        return false;
                }
        }
}

function OnDeny(){
        if(event.ctrlKey || event.keyCode==78 && event.ctrlKey || event.altKey || event.altKey && event.keyCode==115){
                return false;
        }
}

if (document.layers){
        document.captureEvents(Event.MOUSEDOWN);
        document.onmousedown=clickNS4;
        document.onkeydown=OnDeny();
}else if (document.all&&!document.getElementById){
        document.onmousedown=clickIE4;
        document.onkeydown=OnDeny();
}

document.oncontextmenu=new Function("return false");
</script>

<script type="text/javascript">
function clickIE4(){
        if (event.button==2){
                return false;
        }
}

function clickNS4(e){
        if (document.layers||document.getElementById&&!document.all){
                if (e.which==2||e.which==3){
                        return false;
                }
        }
}

function OnDeny(){
        if(event.ctrlKey || event.keyCode==78 && event.ctrlKey || event.altKey || event.altKey && event.keyCode==115){
                return false;
        }
}

if (document.layers){
        document.captureEvents(Event.MOUSEDOWN);
        document.onmousedown=clickNS4;
        document.onkeydown=OnDeny();
}else if (document.all&&!document.getElementById){
        document.onmousedown=clickIE4;
        document.onkeydown=OnDeny();
}

document.oncontextmenu=new Function("return false");
</script>