change value of drop down menu onclick of radio button

[spastica]

I want to create a function so that when a user clicks on a
radio button, a select box drop down menu option is option is changed. here is what I have, and it doesn't work (it does change the html on the page, but that isn't what the problem is - i want it to also change the option value in the select dropdown box).

the error is "refiPurchase is null or not an object". what am I doing wrong?

function hiderefiPricePurchBoxes(form)
{

document.getElementById('refiPricePurch').innerHTML = "";
document.getElementById('refiPurpose_OtherBox').innerHTML = "";
form.refiPurpose.value=="";

}

 

[cLFlaVA]

I assume refiPurpose is your select box.

You'll need to do this:

form.refiPurpose.selectedIndex = 0;

Also, you have the double-equals sign there, which actual means "If the left side of this equal to the right side of this?".

*cLFlaVA
----------------------------
When will I be able to see what other members can see about myself? It's been like, a freakin' month already!

 

[spastica]

that works - but it was still giving the same error when i tried it.

I figured out what the other problem was though. When i called in the function, i was calling it as onClick="javascript:hiderefiPricePurchBoxes(this)" instead of onClick="javascript:hiderefiPricePurchBoxes(form)", which is the correct way.

thank you very much for your help!