Javascript: Form Menu Boxes

Hello,

I am trying to extract the selected value from a menu box on a form, so I can use the value in a function.

In my function, I am currently using:
function1 {
var1 = theform.select1.text
...
}

I am calling the function as follows:
<select name="select1" ... onchange = "function1(this)" >

but var1 is not filling with any values

Also I need to be able to extract a value from a radio button group.
If the group is called RadioGroup1 and there are a number of radio buttons in the group.
To get the value of the button selected would it be
RadioGroup1.value or some other syntax.

Any ideas would be appreciated .
Thanks

if s is the select, you get the selected value with s.options[s.selectedIndex].value.

or s.value

Thanks for that ,

One other question.
if I have 3 radio buttons , how would I - when I click on any of them I want to call a function and assign the radio button value to a variable.

I have no problem calling the function with the onClick event, but I cant seem to distinguish between the 3 buttons.

Was trying RadioGroup1[RadioGroup1.checked].value but it doesnt seem to work.

Any ideas appreciated.

Thanks