<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>屏蔽页面的快捷键测试</title>
</head>
<body>
<div>
哈哈哈，这个页面的很多快捷键（ctrl+s，F12...）都不能用（页面嵌入了iframe框架屏蔽失效），慢慢地手动点击吧！
</div>
<script src="jquery-2.1.4.min.js"></script>
<script>
(function(){
var doc=document,
ua = navigator.userAgent.toLowerCase(),
check = function(r){return r.test(ua);},
isOpera = check(/opera/),
isChrome = check(/chrome/),
isWebKit = check(/webkit/),
isSafari = !isChrome && check(/safari/),
isSafari2 = isSafari && check(/applewebkit\/4/),
isSafari3 = isSafari && check(/version\/3/),
isSafari4 = isSafari && check(/version\/4/),
isIE = !isOpera && check(/msie/),
isIE7 = isIE && check(/msie 7/),
isIE8 = isIE && check(/msie 8/),
isIE9 = isIE && check(/msie 9/),
isIE10 = isIE && check(/msie 10/),
isIE11 = isIE && check(/msie 11/),
isIE6 = isIE && !isIE7 && !isIE8 && !isIE9 && !isIE10 && !isIE11,
isGecko = !isWebKit && check(/gecko/),
isGecko2 = isGecko && check(/rv:1\.8/),
isGecko3 = isGecko && check(/rv:1\.9/);
function preventKey(e) {
var ev = e || window.event,//获取event对象
obj = ev.target || ev.srcElement,//获取事件源
t = obj.type || obj.getAttribute('type'),readonly = obj.readOnly||obj.getAttribute('readonly'), code = ev.keyCode||ev.which||ev.charCode,charcode = String.fromCharCode(code).toLowerCase();//获取事件源控件类型,控件只读属性，键盘值
if ( (code == 8 && t != "password" && t != "text" && t != "textarea")||(readonly&&(t == "password" || t == "text" || t == "textarea"))) {//除不只读输入框外禁止后退键
return false;
}
if (((isOpera || isGecko)?ev.which==0:true)&&(code == 116 || code == 122|| code == 123 || (ev.shiftKey && code == 121))||(((isOpera || isGecko)?ev.which!=0:true)&&ev.ctrlKey && (charcode == 'a' || charcode == 's'))) {//屏蔽 F5,F11,F12,shift+F10,ctrl+a,ctrl+s
if (isIE)
ev.keyCode = 0;
ev.returnValue = false;
return false;
}
};
if (isOpera || isGecko)
doc.onkeypress = preventKey;
else if (isIE || isChrome || isSafari)
doc.onkeydown = preventKey;
if(isIE)document.onselectstart=function(){return false;};
doc.oncontextmenu = function(){
if(window.event){
window.event.cancelBubble = true;
window.event.returnValue=false;
}
return false;
};
try{window.history.forward(1);}catch(e){}
})();
</script>
</body>
</html>
测试效果：
