var aa = "11";
function aa(){alert(123)}
console.log(aa);//11

记住就行了。

var ss = function(){return "11"};

function ss(){return "22"};

ss()//11

var ss = function(){return "11"};

var ss = function(){return "33"};

function ss(){return "22"};

ss()//33

js的一些值得思考的问题