禁止右键、选择、粘贴、shift、ctrl、alt.....
（转载http://www.tongyi.net/article/20050228/200502284204.shtml）
<script language="JavaScript">
<!--
function key(){
if(event.shiftKey){
window.close();}
//禁止shift
if(event.altKey){
window.close();}
//禁止alt
if(event.ctrlKey){
window.close();}
//禁止ctrl
return false;}
document.onkeydown=key;
if (window.Event)
document.captureEvents(Event.MOUSEUP);
//swordmaple javascript article.
//from www.jx165.com
function nocontextmenu(){
event.cancelBubble = true
event.returnValue = false;
return false;}
function norightclick(e){
if (window.Event){
if (e.which == 2 || e.which == 3)
return false;}
else
if (event.button == 2 || event.button == 3){
event.cancelBubble = true
event.returnValue = false;
return false;}
}
//禁止右键
document.oncontextmenu = nocontextmenu; // for IE5+
document.onmousedown = norightclick; // for all others
//-->
</script>
<body onselectstart="return false"; onpaste="return false";>
选择字符试试1010110
<input size=30>
<!--onselectstart禁止选择 onpaste禁止粘贴-->
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