Leniel Maccaferri's blog: radio button

Motivated by this question on StackOverflow - Disable radio button depending on date, I decided to help and here I’m with another code snippet post.

This time I show you how to use jQuery UI and its Datepicker control to control a set of radio buttons (only 2 in this post to make things easier) that have their state (enabled/disabled) changed depending on the date selected by the user.

Here’s the code:

     
<!DOCTYPE html>        
<html>        
<head>        
        
    <meta charset="UTF-8" />        
     
    <title>jQuery UI - Datepicker & Radio Buttons</title>        
        
    <!-- Linking to jQuery stylesheets and libraries -->        
    <link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.7/themes/base/jquery-ui.css" type="text/css" media="all" />        
        
    <link rel="stylesheet" href="http://static.jquery.com/ui/css/demo-docs-theme/ui.theme.css" type="text/css" media="all" />        
    
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" type="text/javascript"></script>        
        
    <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.7/jquery-ui.min.js" type="text/javascript"></script>        
    
    <script src="http://jquery-ui.googlecode.com/svn/tags/latest/external/jquery.bgiframe-2.1.2.js" type="text/javascript"></script>        
        
    <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.7/i18n/jquery-ui-i18n.min.js" type="text/javascript"></script>        
        
</head>        
        
<body>        
        
    <script>        
        
    $(function()        
    {         
        $("#datepicker").datepicker        
        ({           
            // Event raised everytime a date is selected in the datepicker        
            onSelect: function(date)        
            {         
                // Self explanatory :) - used to get today's date        
                var today = new Date();        
        
                // Business logic to change radio buttons' state                 if($("#datepicker").datepicker("getDate") > today)        
                {         
                    $("#radioButton1").attr('disabled', true);        
                    $("#radioButton2").attr('disabled', false);  
                }         
                else        
                {         
                    $("#radioButton1").attr('disabled', false);        
                    $("#radioButton2").attr('disabled', true);  
                }         
            }         
        });         
        
        // Just setting the default localization for the datepicker        
        $.datepicker.setDefaults($.datepicker.regional['']);  
    });         
     
    </script>        
        
    <p>Date: <input id="datepicker" type="text"></p>        
        
    <input id="radioButton1" type="radio" value="myValue1" name="radioButton1"/>Radio button 1<br/>       
    <input id="radioButton2" type="radio" value="myValue2" name="radioButton2"/>Radio button 2       
        
</body>        
        
</html>

If you wanted to control the state (checked/unchecked) you’d have to make a small change in the code as follows:

     
// Business logic to change radio buttons' state                 if($("#datepicker").datepicker("getDate") > today)        
{  
    $("#radioButton1").attr('checked', true);  
    $("#radioButton2").attr('checked', false);   
}  
else  
{  
    $("#radioButton1").attr('checked', false);  
    $("#radioButton2").attr('checked', true);   
}

When you open the page for the first time you get this screen:

Figure 1 - Page when viewed for the first time (both radio buttons are enabled)

If you pick a date that is greater than today’s date, Radio button 1 is disabled (turns to gray) and Radio button 2 is enabled according to the logic implemented.

Figure 2 - Radio button 1 is disabled (turns to gray) and Radio button 2 is enabled