js 删除数组指定下标或指定对象

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/*** 删除数组指定下标或指定对象* arr.remove(2);//删除下标为2的对象（从0开始计算）* arr.remove(str);//删除指定对象*/Array.prototype.remove=function(obj){for(var i =0;i <this.length;i++){var temp = this[i];if(!isNaN(obj)){temp=i;}if(temp == obj){for(var j = i;j <this.length;j++){this[j]=this[j+1];}this.length = this.length-1;}}}