Form validation: if radio "no", then select dropdown req'd

Want the select requirement condition on radio button choice

[timware]

I'm using JS for form validation and I have a radio button that if "No" value is checked, then the next field, a pulldown select, is required. If "Yes" then the pulldown select is not required.

This checks for null and empty:

function isFilled(elm) {
if (elm.value == "" ¦¦
elm.value == null)
return false;
else return true;
}

This checks for the yes/no radio:

var open;
for (var i=0; i<form.Business_open.length; i++) {
if (form.Business_open[i].checked) {
open = 1;
break;
}
}
if (open!= 1) {
alert("Please tell us if your business is open now.");
return false;
}
And this makes the pulldown select required, no matter what. I want it to be conditional on the above radio option being the "no" value; that is, if "no" then select is required:

if(form.When_are_you_opening.options[form.When_are_you_opening.selectedIndex].value == "Select") {

alert("Please tell us when your business is opening.")
form.When_are_you_opening.focus();
return false;
}

Thanks for any help!

Tim

[RonPK]

Well, you'll need read the value of the checked radio button. Add a line to the for-loop, something like this:

var open;
for (var i=0; i<form.Business_open.length; i++) {
if (form.Business_open[i].checked) {
open = 1;
var radioVal = form.Business_open[i].value;
break;
}
}

radioVal can now be either 'no' or 'yes', presuming these are the values you gave the input elements.

[timware]

Thanks, but I'm still a bit confused. As you can tell, my JS skills are rudimentary at best. Looking at the code I provided, how do I set the pulldown select to be required only if the "no" value checkbox was checked. I played around with what you provided but got nowhere.

Thanks again!

Tim