JS禁止右键，捕捉回车等键盘操作

<Script Language=javascript>function Click(){if(document.addEventListener){return false;}}document.onselectstart = Click;document.oncontextmenu = Click;document.body.oncopy = Click;document.onkeydown = = function(evt){var evt=window.event?window.event:evt;  var a=evt.keyCode;//13 为 回车if(a==13) {window.location.href = document.getElementById('toBookChapter').href;}//37 为 左键else if(a==37){window.location.href = document.getElementById('toPrevChapter').href;}//39 为 右键else if(a==39){window.location.href= document.getElementById('toNextChapter').href;}else{return false;}};</Script>