//首先定义一个函数
Array.prototype. unique=function(){
var ret = [];
var json ={};
for(var i = 0;i<this.length;i++){
if(!json[this[i]]){
ret.push(this[i]);
json[this[i]] = 1;
}
}
return ret;
}
var aar =[11,12,12,12,"bihao","你好","good","good"];
//弹出去重后的数组
alert(aar.unique());