屏蔽右键菜单

<script type="text/javascript">

//屏蔽右键菜单

document.oncontextmenu = function (event){

if(window.event){

event = window.event;

}try{

var the = event.srcElement;

if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")){

return false;

}

return true;

}catch (e){

return false; 

} 

}

</script>