如果单击了默认以外的单选按钮，则隐藏下拉框

Question

I swear I'm going to learn more JavaScript...

I have this page (which really an include file in another ASP page, but I copied the correct HTML and made it so it'd load by itself for my testing purposes):

FO Samples

This is how it should show when they first load it. If they choose one of the other radio buttons, it should HIDE the 2 dropdown boxes. Using this code (something I found from someone else's question on here), its working.

<script type="text/javascript">
    function ChangeDropdowns(value) {
        if (value == "0") {
            document.getElementById('SAMPLEDROPDOWN').style.display = 'block';
        } 
        else  {
            document.getElementById('SAMPLEDROPDOWN').style.display = 'none';
        }        
    }
</script>

But I can't figure out how to make it show them again if they go back to the "I wanna pick my own!" radio. The value of SAMPGROUP is the ID from the database of that sample category group. So it won't necessarily be in numerical order, it might skip #'s (if we delete a category or something). Basically, it should show the dropdowns if SAMPGROUP = 0 and not if its anything else!

I tried changing my code to this (95 being the value of SAMPGROUP for the "Autumm" option), but it doesn't seem to have made a difference.

<script type="text/javascript">
    function ChangeDropdowns(value) {
        if (value == "0") {
            document.getElementById('SAMPLEDROPDOWN').style.display = 'block';
        } else if (value == "95") {
        document.getElementById('SAMPLEDROPDOWN').style.display = 'none';
    }
    else  {
        document.getElementById('SAMPLEDROPDOWN').style.display = 'none';
    }        
    }
</script>

Any help would be greatly appreciated!!

Mahalo!

Answer 1

You may not be passing any value to the parameter "value" on calling the function ChangeDropdowns. Please ensure you pass the value like ChangeDropdowns(0) etc..

Answer 2

You are not setting the "value" in your onchange event, thus it's never equal to 0. Try changing this:

<input type="radio" name="SAMPGROUP" value="0" OnChange="Javascript:ChangeDropdowns()" checked />

to

<input type="radio" name="SAMPGROUP" value="0" OnChange="Javascript:ChangeDropdowns(0)" checked />

Here is the fiddle .

Good luck.