/*
* 刪除數組中指定值
*/
Array.prototype.remove=function(value){
var len = this.length;
for(var i=0,n=0;i<len;i++){//把出了要刪除的元素賦值給新數組
if(this[i]!=value){
this[n++]=this[i];
}else{
console.log(i);//測試所用
}
}
this.length = n;
};

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