Question

I have a html form like this :

<form action="https://www.123.com/cgi-bin/action" method="post">
<input type="hidden" name="item_name" value="Product Name">
<input type="hidden" name="item_number" value="Product Name_2010_12_21_15_03">
<input type="hidden" name="amount" value="29.99">
</form>

How to use javascript to replace the above “Product Name_2010_12_21_15_03” with dynamically generated time string ?

Answer 1

Ok, I got it :

    <form action="https://www.123.com/cgi-bin/action" method="post" name="My_Form">
      <input type="hidden" name="item_name" value="Product_Name">
      <input type="hidden" name="item_number" value="Product_Name">
      <input type="hidden" name="amount" value="9.99">
      <script type="text/javascript">
      <!--
        function getCorrectedYear(year)
        {
          year=year-0;
          if (year<70) return (2000+year);
          if (year<1900) return (1900+year);
          return year;
        }
        var today=new Date();
        var minute=today.getMinutes();
        if(minute<10) minute='0'+minute;
        var hour=today.getHours();
        if(hour<10) hour='0'+hour;
        var day=today.getDate();
        if(day<10) day='0'+day;
        var month=today.getMonth()+1;
        if(month<10) month='0'+month;
        var year=getCorrectedYear(today.getYear());
        var dateString=year+'_'+month+'_'+day+'_'+hour+'_'+minute;
        document.My_Form.item_number.value=document.My_Form.item_name.value+'_'+dateString;
      //-->
      </script>
    </form>