jQuery及JS实现循环中暂停的方法

<script type="text/javascript">
var arr = new Array();
var arrk = 0;
jQuery(function() {
arr[0] = "aaa.keleyi.";
arr[1] = "bbb.keleyi.";
arr[2] = "c.keleyi.";
mytime = setInterval(function(){showme()}, 2000);
function showme(){
alert(arr[arrk]);
arrk += 1;
if(arrk>2) clearInterval(mytime);
}
});
</script>

<script type="text/javascript">
var arr = new Array();
var arrk = 0; 
arr[0] = "aaa.keleyi.";
arr[1] = "bbb.keleyi.";
arr[2] = "c.keleyi.";
mytime = setInterval(function () { showme() }, 2000);
function showme() {
alert(arr[arrk]);
arrk += 1;
if (arrk > 2) clearInterval(mytime);
}
</script>