JS code that prohibits shortcut keys such as F5_Typical special effects

JS code to disable ctrl n and ctrl r and disable shift f10, disable the right or left mouse button and disable f5

<script> <BR>//禁止ctrl+n和 禁止ctrl+r和 禁止shift+f10 禁止鼠标右键or左右键 和禁止f5 <BR>var oLastBtn=0,bIsMenu=false <BR>if (window.Event) <BR>{ <BR>document.captureEvents(Event.MOUSEUP); <BR>} <br><br>function nocontextmenu() <BR>{ <BR>event.cancelBubble=true; <BR>event.returnValue=false; <BR>return false; <BR>} <br><br>function norightclick(e) <br><br>{ <BR>if(window.Event) <BR>{ <BR>if (e.which !=1) <BR>{ <BR>return false; <BR>} <BR>} <BR>else <BR>if(event.button!=1) <BR>{ <BR>event.cancelBubble=true; <BR>event.returnValue=false; <BR>return false; <BR>} <BR>} <br><br>document.oncontextmenu=nocontextmenu; <BR>document.onmousedown=norightclick; <br><br>function onKeyDown() <BR>{ <BR>if ((event.altKey)||((event.keyCode==8)&&(event.srcElement.type!="text"&&event.srcElement.type!="textarea"&&event.srcElement.type!="password"))||((event.ctrlKey)&&((event.keyCode==78)||(event.keyCode==82)))||(event.keyCode==116)) <BR>{ <BR>event.keyCode=0; <BR>event.returnValue=false; <BR>} <BR>} <BR></script>