JS自定义Array原型移除函数

　　<script type="text/javascript">
    //删除元素值
    Array.prototype.remove = function(element){

        for (var i = 0,j=0; i < this.length; i++) {
            if(this[i]!=element){
                this[j++]=this[i];
            }
        }
        this.length-=1
    }
    //删除元素下标
    Array.prototype.removeIndex=function(dx)
    {
        if(isNaN(dx)||dx>this.length)
        {
            alert("删除对象下标越界");
            return false;
        }
        for(var k=0,n=0;k<this.length;k++)
        {
            if(this[k]!=this[dx])
            {
                this[n++]=this[k];
            }
        }
        this.length-=1
    } 

    var arr =["Iphone","MI","SAMSUNG","VIVO","OPPO","HUAWEI","ZTE","SONY","Coolpad","GiONEE","MEIZU","nubia","Letv","TCL"];
    arr.push("NOKIA");
    arr.remove("Iphone");
    arr.removeIndex(1);
    alert(arr.join(","));

</script>