How can I populate other text fields by selecting an option from a list box?

Thank you! this so promising!

I can't work Option2 to populate its values to the fields when I click on it.

Here is the code:

var text1Value = "";

var text2Value = "";

switch (this.getField("dropdownList").value)

{

    case "Option1":

         text1Value = "Option1Value";

         text2Value = "Option1Value";        

          break;

    case "Option2":

         text1Value = "Option2Value";

         text2Value = "Option2Value";        

          break;

     default:

          text1Value = "Please select an option for this field to populate";

          text2Value = "Please select an option for this field to populate";

          break;

}

this.getField ("text1").value = text1Value;

this.getField("text2").value = text2Value;

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I am noob to JS, but I think the "click event" is not recognized?

Thank you for your help!