Javascript防止短时间内button被点击多次

< script language="javascript" type="application/javascript">var times = 0;//点击次数var preClickTime ;//上一次点击的时间（毫秒）var currentClickTime;//当前点击时间function countClickedTimes(){if(times === 0){preClickTime = new Date().getTime();//首次点击的时间times ++;alert("当前点击次数:"+times);return;}currentClickTime = new Date().getTime();//alert(currentClickTime - preClickTime);if((currentClickTime - preClickTime) < 3000) {//如果是3秒内重复点击alert("亲，您的点击速度过快...");preClickTime = currentClickTime;return;} times ++ ;preClickTime = currentClickTime;alert("当前点击次数:"+times);}< /script>< body><a href="javascript:countClickedTimes();">统计点击次数</a>< /bo dy>