Code for validating radio button in javascript


04-Sep-2015 01:38

The setup and validation of radio buttons appears to be the form field that gives many webmasters the most difficulty in setting up.

Note that the buttons are numbered starting from zero.

In this instance for the purpose of illustration, we simply display an alert advising which button was selected (shown in italics).

Since then developments in Java Script have introduced ways to perform radio button validation in far less obtrusive ways however the less obtrusive code is slightly more complicated and has a significant overhead if you do not use that approach for all of your field validations (as you ought to).

Of course many people still use this means of validating radio buttons simply because the code is easier for them to understand.

-1; i--) { if (thisform.myradiobutton[i].checked) { my Option = i; i = -1; } } if (my Option == -1) { alert("You must select a radio button"); return false; } alert("You selected button number " + my Option + " which has a value of " + thisform.myradiobutton[my Option].value); // place any other field validations that you require here thisform.submit(); // this line submits the form after validation }It should be a relatively simple matter for you to take the above form field definitions and javascript and incorporate it into your form.

code for validating radio button in javascript-37

Chat to sexy women no register

What follows is my original description of how to validate radio buttons written back in 2001.

At that time this was the only way to do the validation.

So you want to put radio buttons on a form on your page but don't know how to go about validating that one has been selected or determining which one has been selected.

Well here we have a form containing three radio buttons to show you how to do it. Note that the highlighted parts of this code will be referenced within the validation javascript, you can call them what you like but you must name fields consistently (ie.

all fields shown highlighted here and in the javascript with the same name must still all have the same name if you rename them.The javascript that this form uses to validate that a radio button has been selected follows.



Mischa Barton was arguably the "it" girl of the mid-2000s after playing the troubled girl-next-door Marissa Cooper, but never saw the same success as she did after her early exit from the series.… continue reading »


Read more

As a member you can also use more advanced search options to find other singles by interest, age, location, or whether they have children or smoke.… continue reading »


Read more

Free to a Good Home Live is happening on July 16th in...… continue reading »


Read more

Copays, insurance cards, and referrals are expected at time of service.… continue reading »


Read more