Javscript删除数组中指定元素

把数组中某个值删除，并返回新数组，需要遍历旧数组找到要删除的元素

/*
 * 删除数组中指定值
 */
Array.prototype.remove=function(value){  
  var len = this.length;
  for(var i=0,n=0;i<len;i++){//把出了要删除的元素赋值给新数组  
    if(this[i]!=value){  
      this[n++]=this[i];
    }else{
      console.log(i);//测试所用
    }
  }  
  this.length = n;
};

var arr = ["1","2","3","5","2","1","4","2","2"];
arr.remove(2);
console.log(arr);