Javascript 屏蔽右鍵菜單效果代碼

　　最簡單的所有都屏蔽右鍵菜單

代碼如下  

　　
<script type="text/javascript">
documentbodyoncontextmenu=new function(){return false;};
</script>

　　我們希望在INPUTtextTEXTAREA中可以實現右擊但在其它頁面都要屏蔽右鍵菜單

　　實例代碼

代碼如下  

　　<script type="text/javascript">
//屏蔽右鍵菜單
documentoncontextmenu = function (event){
if(windowevent){
event = windowevent;
}try{
var the = eventsrcElement;
if (!((thetagName == "INPUT" && thetypetoLowerCase() == "text") || thetagName == "TEXTAREA")){
return false;
}
return true;
}catch (e){
return false;
}
}
</script>

From:http://tw.wingwit.com/Article/program/Java/JSP/201311/19976.html