<script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>

  <script type="text/javascript">

  $(function(){

　　/*

　　*  日期格式化

　　*/

　　Date.prototype.format = function (format) {

    var o = {

        "M+": this.getMonth() + 1, //month

        "d+": this.getDate(),    //day

        "h+": this.getHours(),   //hour

        "m+": this.getMinutes(), //minute

        "s+": this.getSeconds(), //second

        "q+": Math.floor((this.getMonth() + 3) / 3),  //quarter

        "S": this.getMilliseconds() //millisecond

    }

    if (/(y+)/.test(format))

        format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));

    for (var k in o) if (new RegExp("(" + k + ")").test(format))

        format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));

    return format;

　　}

    var date =new Date();

　　alert(date.getHours()+"_"+date.getMinutes()+"_"+date.getSeconds())

 　 alert(date.format('yyyy-MM-dd'))

    alert(date.format('hh-mm-ss'))

  })

  </script>