=
<script>
var arr = ["1","2","3"];
var diedai = (function(){
var length = arr.length,
index = 0;
return {
hasNext:function(){
return index < length;
},next:function(){
var data = arr[index];
index = index+1;
return data;
}
}
})();
while(diedai.hasNext()){
alert(diedai.next());
}
</script>
