删除数组制定元素或下标

/*/***删除数组指定下标或指定对象*/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;        }       }}});Var a =[1a,2a,3a,4a,5a];a.remove(3a);