function click(e) { 

if (document.all) { 

if (event.button==1||event.button==2||event.button==3) { 

oncontextmenu='return false'; 

} 

} 

if (document.layers) { 

if (e.which == 3) { 

oncontextmenu='return false'; 

} 

} 

} 

if (document.layers) { 

document.captureEvents(Event.MOUSEDOWN); 

} 
document.onmousedown=click; 

document.oncontextmenu = new Function("return false;") 

var travel=true 

var hotkey=17 /* hotkey即为热键的键值,是ASII码,这里99代表c键 */ 

if (document.layers) 

document.captureEvents(Event.KEYDOWN) 

function gogo(e) 

{ if (document.layers) { 

if (e.which==hotkey&&travel){ 

alert("操作错误.或许是您按错了按键!"); } } 

else if (document.all){ 

if (event.keyCode==hotkey&&travel){ alert("操作错误.或许是您按错了按键!"); }} 

} 

document.onkeydown=gogo