var d = new dynamicSelect();
   d.addSelect('racetype');

d.selects['racetype'].addOption('1');
d.selects['racetype'].options['1'].createOption('', '0');
d.selects['racetype'].options['1'].createOption('Mini Sprint', '1');
d.selects['racetype'].options['1'].createOption('Sprint', '2');
d.selects['racetype'].options['1'].createOption('Olympic', '3');
d.selects['racetype'].options['1'].createOption('1/2 Ironman', '4');
d.selects['racetype'].options['1'].createOption('Full Ironman', '5');
d.selects['racetype'].options['1'].createOption('Short Course', '6');
d.selects['racetype'].options['1'].createOption('Long Course', '7');
d.selects['racetype'].options['1'].createOption('Winter', '8');
d.selects['racetype'].options['1'].createOption('Winter Maintenance', '9');
d.selects['racetype'].options['1'].createOption('Other', '99');
d.selects['racetype'].addOption('2');
d.selects['racetype'].options['2'].createOption('', '0');
d.selects['racetype'].options['2'].createOption('Standard', '1');
d.selects['racetype'].options['2'].createOption('Xterra', '3');
d.selects['racetype'].options['2'].createOption('Winter', '4');
d.selects['racetype'].options['2'].createOption('Powerman', '5');
d.selects['racetype'].options['2'].createOption('Other', '99');
d.selects['racetype'].addOption('3');
d.selects['racetype'].options['3'].createOption('', '0');
d.selects['racetype'].addOption('4');
d.selects['racetype'].options['4'].createOption('', '0');
d.selects['racetype'].addOption('5');
d.selects['racetype'].options['5'].createOption('', '0');
d.selects['racetype'].addOption('6');
d.selects['racetype'].options['6'].createOption('', '0');
d.selects['racetype'].options['6'].createOption('3 Mile', '1');
d.selects['racetype'].options['6'].createOption('5k', '2');
d.selects['racetype'].options['6'].createOption('3.5 Mile', '3');
d.selects['racetype'].options['6'].createOption('4 Mile', '4');
d.selects['racetype'].options['6'].createOption('8k', '5');
d.selects['racetype'].options['6'].createOption('5 Mile', '6');
d.selects['racetype'].options['6'].createOption('10k', '7');
d.selects['racetype'].options['6'].createOption('15k', '8');
d.selects['racetype'].options['6'].createOption('10 Mile', '9');
d.selects['racetype'].options['6'].createOption('20k', '10');
d.selects['racetype'].options['6'].createOption('Half Marathon', '11');
d.selects['racetype'].options['6'].createOption('15 Mile', '12');
d.selects['racetype'].options['6'].createOption('25k', '13');
d.selects['racetype'].options['6'].createOption('30k', '14');
d.selects['racetype'].options['6'].createOption('20 Mile', '15');
d.selects['racetype'].options['6'].createOption('25 Mile', '16');
d.selects['racetype'].options['6'].createOption('Marathon', '17');
d.selects['racetype'].options['6'].createOption('Ultra Marathon', '18');
d.selects['racetype'].options['6'].createOption('Other', '99');
d.selects['racetype'].addOption('7');
d.selects['racetype'].options['7'].createOption('', '0');
d.selects['racetype'].options['7'].createOption('50 Freestyle', '1');
d.selects['racetype'].options['7'].createOption('100 Freestyle', '2');
d.selects['racetype'].options['7'].createOption('200 Freestyle', '3');
d.selects['racetype'].options['7'].createOption('400 Freestyle', '4');
d.selects['racetype'].options['7'].createOption('800 Freestyle', '5');
d.selects['racetype'].options['7'].createOption('1000 Freestyle', '6');
d.selects['racetype'].options['7'].createOption('1650 Freestyle', '7');
d.selects['racetype'].options['7'].createOption('50 Backstroke', '8');
d.selects['racetype'].options['7'].createOption('100 Backstroke', '9');
d.selects['racetype'].options['7'].createOption('200 Backstroke', '10');
d.selects['racetype'].options['7'].createOption('400 Backstroke', '11');
d.selects['racetype'].options['7'].createOption('800 Backstroke', '12');
d.selects['racetype'].options['7'].createOption('50 Breast', '13');
d.selects['racetype'].options['7'].createOption('100 Breast', '14');
d.selects['racetype'].options['7'].createOption('200 Breast', '15');
d.selects['racetype'].options['7'].createOption('50 Fly', '16');
d.selects['racetype'].options['7'].createOption('100 Fly', '17');
d.selects['racetype'].options['7'].createOption('200 Fly', '18');
d.selects['racetype'].options['7'].createOption('1 Hour Postal', '19');
d.selects['racetype'].options['7'].createOption('3000 Yard Postal', '20');
d.selects['racetype'].options['7'].createOption('6000 Yard Postal', '21');
d.selects['racetype'].options['7'].createOption('2.5k Postal', '22');
d.selects['racetype'].options['7'].createOption('5k Postal', '23');
d.selects['racetype'].options['7'].createOption('10k Postal', '24');
d.selects['racetype'].options['7'].createOption('1 mile Cable', '25');
d.selects['racetype'].options['7'].createOption('2 mile Cable', '26');
d.selects['racetype'].options['7'].createOption('Other', '99');
d.selects['racetype'].addOption('8');
d.selects['racetype'].options['8'].createOption('', '0');
d.selects['racetype'].options['8'].createOption('Road Race', '1');
d.selects['racetype'].options['8'].createOption('Century', '2');
d.selects['racetype'].options['8'].createOption('Criterium', '3');
d.selects['racetype'].options['8'].createOption('Time Trial', '4');
d.selects['racetype'].options['8'].createOption('Tour', '5');
d.selects['racetype'].options['8'].createOption('Cyclocross', '6');
d.selects['racetype'].options['8'].createOption('Mountain Biking', '7');
d.selects['racetype'].options['8'].createOption('Gravel', '8');
d.selects['racetype'].options['8'].createOption('Other', '99');
d.selects['racetype'].addOption('9');
d.selects['racetype'].options['9'].createOption('', '0');
d.selects['racetype'].addOption('10');
d.selects['racetype'].options['10'].createOption('', '0');
d.selects['racetype'].addOption('11');
d.selects['racetype'].options['11'].createOption('', '0');


function dynamicSelect()
{
  this.selects = new Array();

  this.addSelect = function(name)
  {
    this.selects[name] = new selectObj();
  }


  this.updateOptions = function(source, target)
  {
    var form = source.form;
    var target = form.elements[target];
    var value = source.options[source.selectedIndex].value;

    while(target.options.length) target.remove(0);

    if(!this.selects[source.name].options[value])
    {
      //alert('Invalid selection.'); //For debugging while you set it up
      return;
    }

    var data = this.selects[source.name].options[value].options;


    for(var x=0; x<data.length; x++)
    {
      try
      {
        target.add(data[x]);
      }
      catch(e)
      {
        target.add(data[x], null);
      }
    }

    
    target.selectedIndex = 0;
  }

}


function selectObj()
{
  this.options = new Array();

  this.addOption = function(value)
  {
    this.options[value] = new optionObj();
  }
}


function optionObj()
{
  this.options = new Array();

  this.createOption = function(name, value)
  {
    this.options[this.options.length] = new Option(name, value);
  }
}