js将数组元素随机排序的方法

<script type="text/javascript">
Array.prototype.shuffle=function(){
    _this=this;
    this.re=[];
    this.t=this.length;
    for(var i=0;i<this.t;i++){
        (function(i){
            var temp=_this;
            var m=Math.floor(Math.random()*temp.length);
            _this.re[i]=temp[m];
            _this.splice(m,1);
        })(i)    
    }
    return this.re
}


var arr=[0,1,2,3,4,5,6,7];
var arrs=["00","11","22","33","44","55","66","77"];
alert(arrs.shuffle());
alert(arr.shuffle());
</script>