在网页中屏蔽快捷键_黑客性质

<script> <BR>//屏蔽鼠标右键、Ctrl+N、Shift+F10、F5刷新、退格键 <BR>//屏蔽F1帮助 <BR>function window.onhelp() <BR>{ <BR>return false <BR>} <BR>function KeyDown() <BR>{ <BR>//alert(event.keyCode); <BR>//屏蔽 Alt+ 方向键 ← 屏蔽 Alt+ 方向键 → <BR>if ((window.event.altKey)&&((window.event.keyCode==37)||(window.event.keyCode==39))) <BR>{ <BR>//alert("不准你使用ALT+方向键前进或后退网页！"); <BR>event.returnValue=false; <BR>} <BR>//屏蔽退格删除键,屏蔽 F5 刷新键,Ctrl + R <BR>if ((event.keyCode==116)||(event.ctrlKey && event.keyCode==82)) <BR>{ <BR>event.keyCode=0; <BR>event.returnValue=false; <BR>} <BR>//屏蔽 Ctrl+n <BR>if ((event.ctrlKey)&&(event.keyCode==78)) <BR>{ <BR>event.returnValue=false; <BR>} <BR>//屏蔽 shift+F10 <BR>if ((event.shiftKey)&&(event.keyCode==121)) <BR>{ <BR>event.returnValue=false; <BR>} <BR>//屏蔽 shift 加鼠标左键新开一网页 <BR>if (window.event.srcElement.tagName == "A" && window.event.shiftKey) <BR>{ <BR>window.event.returnValue = false; <BR>} <BR>//屏蔽Alt+F4 <BR>if ((window.event.altKey)&&(window.event.keyCode==115)) <BR>{ <BR>window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px"); <BR>return false; <BR>} <BR>//屏蔽Ctrl+A <BR>if((event.ctrlKey)&&(event.keyCode==65)) <BR>{ <BR>return false; <BR>} <BR>} <BR></script>