时间格式校验

/*
 * 时间格式校验
 */
function changev(){
    var reg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/;
    var dt_schedule_send=document.getElementById("DT_SCHEDULE_SEND").value;
    var dateformat=dt_schedule_send.match(reg)
    if(dateformat==null || dateformat[3]>12 || dateformat[4]>31 || dateformat[5]>23 || dateformat[6]>59 || dateformat[7]>59){
      document.getElementById("errorMessage").innerHTML="error"
      document.getElementById("errorMessage").style.fontSize='14'
      document.getElementById("errorMessage").style.color='red'
    }else{
      document.getElementById("errorMessage").innerHTML=""
    }
}