一定时间内连续点击只有最后一次点击进行ajax提交

<a onclick="clickIncrement()" href="javascript:void(0);">+</a>

<script type="text/javascript">

var this_timer_id = null;
function clickIncrement(){

             if(typeof this_timer_id != null) { clearTimeout(this_timer_id); }
             this_timer_id = setTimeout(XXXX, 1000); //1000ms  XXXX是ajax提交方法

}
</script>