JS实现日期加减的简单例子

<script type="text/javascript">
 $(function() {
     $("#<%=tbcxrq.ClientID %>").change(function() { CaclDate(); });
     $("#<%=tblq.ClientID %>").change(function() { CaclDate(); });
     //根据龄期计算试验时间
     function CaclDate() {
if ($("#<%=tblq.ClientID %>").val() == "" || $("#<%=tbcxrq.ClientID %>").val() == "") {
      $("#<%=tbyqsyrq.ClientID %>").val("");
  }
  else { // www.jiaochengji.com
      var MoldingDate = $("#<%=tbcxrq.ClientID %>").val();
      MoldingDate = MoldingDate.replace("-", "/")
      var d = new Date(MoldingDate);
      var AgeDate = $("#<%=tblq.ClientID %>").val();
      d.setDate(d.getDate() + parseInt(AgeDate));
      var month = d.getMonth() + 1;
      if (parseInt(month) < 10)
   month = "0" + month;
      var day = d.getDate();
      if (parseInt(day) < 10)
   day = "0" + day;
      var date = (d.getFullYear()) + "-" + month + "-" + day;
      $("#<%=tbyqsyrq.ClientID %>").val(date);
  }
     }
 });
</script>