/**
*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;
}
}
}