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**Willy Duitt** · Feb 14, 2004, 11:06 AM

This should get you started:

Code:

<script type="text/javascript">
 <!--//
  function loadOptions(which){
    var animals = new Array();
    var cars = new Array();

        animals[0]=new Option('Cats','Cats');
        animals[1]=new Option('Dogs','Dogs');
        animals[2]=new Option('Pigs','Pigs');

        cars[0]=new Option('Buick','Buick');
        cars[1]=new Option('Chevy','Chevy');
        cars[2]=new Option('Olds','Olds');

   if(which.value=="animals"){myOptions = animals};
   if(which.value=="cars"){myOptions = cars};
    for(i=0;i<myOptions.length;i++){
      document.form1.menu.options[i] = myOptions[i];
    }
  }
 //-->
</script>
<form name="form1">
<input type="radio" value="animals" name="optMenu" checked onclick="loadOptions(this)">Animals<br>
<input type="radio" value="cars" name="optMenu" onclick="loadOptions(this)">Cars<br>


<select name="menu">
<option value="Cats">Cats</option>
<option value="Dogs">Dogs</option>
<option value="Pigs">Pigs</option>
</select>

.....Willy

**Matt_Helvey** · Feb 14, 2004, 03:57 PM

ohh man, I'm REALLY thankful, just in time.
appreciated it mate

**Willy Duitt** · Feb 15, 2004, 01:18 AM

Your Welcome;

FWIW: Here's another way without the radio buttons.

Code:

<script type="text/javascript">
 <!--//
  function loadOptions(which){
    var theOptions = document.form1.menu; // FORM NAME //;
    var main = new Array();
        main[0]=new Option('Pick A Subject','');
        main[1]=new Option('Animals','animals');
        main[2]=new Option('Cars','cars');

    var animals = new Array();
        animals[0]=new Option('Pick An Animal','');
        animals[1]=new Option('Cats','cats');
        animals[2]=new Option('Dogs','dogs');
        animals[3]=new Option('Pigs','pigs');
        animals[4]=new Option('Return To Main Menu','main');

    var cars = new Array();
        cars[0]=new Option('Pick A Car','');
        cars[1]=new Option('Buick','buick');
        cars[2]=new Option('Chevy','chevy');
        cars[3]=new Option('Olds','olds');
        cars[4]=new Option('Return To Main Menu','main');

   if(which == 'main')    {myOptions = main};
   if(which == 'animals') {myOptions = animals};
   if(which == 'cars')    {myOptions = cars};

     for(j=theOptions.length; j>myOptions.length-1; j--){
       if(theOptions.length > myOptions.length){
          for(i=0; i<myOptions.length; i++){
              theOptions[i] = myOptions[i];
              theOptions[j] = null;
          }
       }
     }

       if(myOptions.length > theOptions.length){
         for(i=0; i<myOptions.length; i++){
             theOptions[i] = myOptions[i];
         }
       }

  }
 //-->
</script>
</HEAD>


<BODY onload="loadOptions('main')">
<form name="form1">
<select name="menu" onchange="loadOptions(this[this.selectedIndex].value)"></select>

.....Willy

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