Javascript Question - Multiple Select Box

[Superwormy]

Aight, I have a multiple select box:

<select name="category[]" multiple="multiple" size="5">
<option value="1">numberone</option>
<option value="2">nubmertwo</option>
<optoin value="3">numberthree</option>

</select>

Now, I want to test with javascirpt to make sure that NEITHER 1 or 3 are selected. I know I can refer to it like by .value, but it only gives me the first selected option then... how to I check the rest...?

Sorry for the newb question, I'm a PHP kinda guy, me no like Javascirpt 🙂

 

[Shazam]

Something like:

if (category.options[0].selected && category.options[2].selected) {
alert("You fool! You can't select number one and three at the same time!");
category.options[0].selected == false;
category.options[2].selected == false;
}

 

[Superwormy]

OK but then if the order of things in the selectbox changes, it'll break.

I need to have it testing the values of the selected objects I guess... does that make sense?

 

[Shazam]

Yes. You'll have to loop through the options property array of the select box, and get the value property for each element and see what value it is.