마우스 우클릭 해제 방법

javascript:function r(d){d.oncontextmenu=null;d.onselectstart=null;d.ondragstart=null;d.onkeydown=null;d.onmousedown=null; d.body.oncontextmenu=null;d.body.onselectstart=null;d.body.ondragstart=null;d.body.onkeydown=null; d.body.onmousedown=null;};function unify(w){r(w.document);if(w.frames.length>0){for(var i=0;i<w.frames.length;i++){try{unify(w.frames[i].window);}catch(e){}};};};unify(self);alert("ok");