禁止选择：
<SCRIPT language=javascript type=text/javascript> var omitformtags=["input", "textarea", "select"] ;omitformtags=omitformtags.join("|") ;function disableselect(e){ return false;} function reEnable(){ return true;} if (typeof document.onselectstart!="undefined") document.onselectstart=new Function ("return false") ;else{ document.onmousedown=disableselect ;document.onmouseup=reEnable ;} </SCRIPT>

禁止右键：

<SCRIPT language=javascript type=text/javascript> function stop(){ return false; } document.oncontextmenu=stop; </SCRIPT>

此段代码可破解限制：

with(document)oncontextmenu=onselectstart=ondragstart=onbeforecopy=oncopy=onselect=function(){return true};void(0);