js 相关函数

毫秒数类型转为 年月日

记住parseInt(time) 很重要,否则如果类型不知道的话,转化将有问题

function _formatDate(time){

if(time==null){
return "";
}
var mydate = new Date(parseInt(time));
var year = mydate.getFullYear();
    var month = mydate.getMonth()+1;    //js从0开始取
    var date1 = mydate.getDate();
return year+"-"+month+"-"+date1;
}

----------------------------------------日期加减----------------------------
<script>
function   DateAdd(interval,number,date)
{
/*
  *---------------   DateAdd(interval,number,date)   -----------------
  *   DateAdd(interval,number,date) 
  *   功能:实现VBScript的DateAdd功能.
  *   参数:interval,字符串表达式，表示要添加的时间间隔.
  *   参数:number,数值表达式，表示要添加的时间间隔的个数.
  *   参数:date,时间对象.
  *   返回:新的时间对象.
  *   var   now   =   new   Date();
  *   var   newDate   =   DateAdd( "d ",5,now);
  *   author:wanghr100(灰豆宝宝.net)
  *   update:2004-5-28   11:46
  *---------------   DateAdd(interval,number,date)   -----------------
  */
        switch(interval)
        {
                case   "y "   :   {
                        date.setFullYear(date.getFullYear()+number);
                        return   date;
                        break;
                }
                case   "q "   :   {
                        date.setMonth(date.getMonth()+number*3);
                        return   date;
                        break;
                }
                case   "m "   :   {
                        date.setMonth(date.getMonth()+number);
                        return   date;
                        break;
                }
                case   "w "   :   {
                        date.setDate(date.getDate()+number*7);
                        return   date;
                        break;
                }
                case   "d "   :   {
                        date.setDate(date.getDate()+number);
                        return   date;
                        break;
                }
                case   "h "   :   {
                        date.setHours(date.getHours()+number);
                        return   date;
                        break;
                }
                case   "m "   :   {
                        date.setMinutes(date.getMinutes()+number);
                        return   date;
                        break;
                }
                case   "s "   :   {
                        date.setSeconds(date.getSeconds()+number);
                        return   date;
                        break;
                }
                default   :   {
                        date.setDate(d.getDate()+number);
                        return   date;
                        break;
                }
        }
}

var   now   =   new   Date();
//加五天.
var   newDate   =   DateAdd( "d ",5,now);
alert(newDate.toLocaleDateString())
//加两个月.
newDate   =   DateAdd( "m ",2,now);
alert(newDate.toLocaleDateString())
//加一年
newDate   =   DateAdd( "y ",1,now);
alert(newDate.toLocaleDateString())
</script>