18-Nov-2015 17:06

Validating radio

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).

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.An alert advising that you must select a button will display if no button is selected.When a button is selected, the value of the my Option field will contain the number of the button selected." } }, error Placement: function(error, element) { if ( element.is(":radio") ) { error.append To( element.parents('.container') ); } else { // This is the default behavior error.insert After( element ); } } }); }); As a PRO member, you can drag-and-drop upload files here to use as resources. You can even edit them anytime, like any other code on Code Pen.

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.

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.

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.

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