Javscript删除数组中指定元素并返回新数组

/*
*删除数组中指定值
*/
Array.prototype.remove=function(value){
varlen=this.length;
for(vari=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;
};

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