冷高峰的技术小站

不多说， 贴代码
通过重写系统回调函数， 屏蔽默认行为

<script language="javascript"> 
	function testKeyDown(event) {

		if ((event.keyCode == 112)  || 
		//屏蔽 F1   
		(event.keyCode == 113)  || //屏蔽 F2  
		(event.keyCode == 114)  || //屏蔽 F3  
		(event.keyCode == 115)  || //屏蔽 F4  
		(event.keyCode == 116)  || //屏蔽 F5   
		(event.keyCode == 117)  || //屏蔽 F6   
		(event.keyCode == 118)  || //屏蔽 F7   
		(event.keyCode == 119)  || //屏蔽 F8   
		(event.keyCode == 120)  || //屏蔽 F9   
		(event.keyCode == 121)  || //屏蔽 F10   
		(event.keyCode == 122)  || //屏蔽 F11   
		(event.keyCode == 123))    //屏蔽 F12  
		{   
			event.keyCode = 0;
			event.returnValue = false;
		} 
	} 

	function disableMenu(){
		if(Log.ShowDebug) { return;} 
		document.onkeydown = function(){testKeyDown(event)} 
		window.onhelp = function(){
			return false;
		}

		document.oncontextmenu = function () {
			window.event.returnValue = false;
			return false;
		}
	}
	disableMenu();
 </script>