Setting Radio Buttons Value

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Jan 7th, 2002, 03:48 PM
TheGoldenShogun

Setting Radio Buttons Value

I'm writing a script that has four radio buttons. They each have a value of A, B, C, and D. Now, I am pulling a letter value from a database using CGIREXX code (I don't expect anybody to know any CGIREXX) and I have the value, lets say "B" set to a variable. How do I initially set the default value of the radio button group to equal the radio button with the value of "B"? I read something about a defaultChecked property but I wasn't able to get it to work, if you know about this property and how to set it, or just a way to set the default value dynamically, please let me know. Thanks.

:cool:
Jan 7th, 2002, 04:09 PM
thinktank2

At start up.

Code:

<html> <head> <title>Test</title> </head> <body> <form name="myform"> A<INPUT TYPE="radio" NAME="myoption"> B<INPUT TYPE="radio" NAME="myoption" CHECKED> C<INPUT TYPE="radio" NAME="myoption"> D<INPUT TYPE="radio" NAME="myoption"> </form> </body> </html>

At runtime to check A, use
document.myform.myoption[0].checked = true;
Jan 7th, 2002, 04:15 PM
TheGoldenShogun

that would work, I knew about the CHECKED thing that you can embed in the tag but I want to take a variable, and through JavaScript set it. I don't know which value is going to be checked each time so I need to set it dynamically.

I could use that document.form.options[x].checked line but I would need to run it through a loop to check if

document.form.options.value = myVariable

and if so then set the .checked to true. but isn't there a simplier way. To set a textbox you just say document.form.tBox.value = myVariable.
Jan 7th, 2002, 04:25 PM
thinktank2

No. there isn't a simple way as far as I know.. u have to loop through all the option box.
Jan 7th, 2002, 04:28 PM
TheGoldenShogun

thanks, that won't be too hard to do. I was just being lazy, trying to find an easier way.