塞一个标题栏美化及按键屏蔽代码

原网页：

离开后：

<script>
/*标题栏变化*/
$(function(){
var OriginTitile = document.title;
var titleTime;
document.addEventListener('visibilitychange', function () {
    if (document.hidden) {
        $('[rel="shortcut icon"]').attr('href', "/fail.ico");
        document.title = '(●—●)喔哟，崩溃啦！';
        clearTimeout(titleTime);
    }
    else {
        $('[rel="shortcut icon"]').attr('href', "/favicon.ico");
        document.title = '(/≧▽≦/)咦！又好了！' + OriginTitile;
        titleTime = setTimeout(function () {
            document.title = OriginTitile;
        }, 2000);
    }
});
		//屏蔽鼠标右键
document.oncontextmenu = function(e){
    return false;
};
		//屏蔽f12等
document.onkeydown = function(e){
    var e = e || event;
    var nums = [113,114,115,116,117,118,119,120,121,122,123];
    for(var i in nums){
        if(e.keyCode == nums[i]){
            return false;
        }
    }
};

	});
	
</script>

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