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 
if (document.layers) 
document.captureEvents(Event.KEYDOWN) 
/*function gogo(e) 
{ if (document.layers) { 
if (e.which==hotkey&&travel){ 
alert("操作错误，右键被禁止!"); } } 
else if (document.all){ 
if (event.keyCode==hotkey&&travel){ alert("对不起，复制被禁止!"); }} 
}
document.onkeydown=gogo*/ 



var omitformtags=["input", "textarea", "select"]

omitformtags=omitformtags.join("|")

function disableselect(e){ 
if (omitformtags.indexOf(e.target.tagName.toLowerCase())==-1) 
return false 
}

function reEnable(){ 
return true 
}

if (typeof document.onselectstart!="undefined") 
document.onselectstart=new Function ("return false") 
else{ 
document.onmousedown=disableselect 
document.onmouseup=reEnable 
}