Enable/Disable Controls on selection of Radio using jquery

Question

I am trying to Enable/Disable certain controls depending upon the selection of Radio. it doesn't seem to be working. I want the disabled text and radio fields to be enabled when yes radio is selected. Please help!

ASP snippet

                <div class="form-group" >
                    <label class="control-label">Whether any other children of the same family is studying in Primary/ Secondary Section of SVVHS</label><br />
                    <input type="radio" value="yes" id="chkRelatedStudentYes" runat="server" name="RelatedStudent" required="required"/> <label class="control-label">Yes</label><br />
                    <input type="radio" value="no" id="chkRelatedStudentNo" runat="server" name="RelatedStudent" required="required"/> <label class="control-label">No</label>
                 </div>
                <div class="form-group">
                    <label class="control-label">Name of the Student</label>
                    <input maxlength="100" type="text" required="required" class="form-control" placeholder="Enter Name of the Related Student" id="txtRelatedStudentName" runat="server" disabled="disabled" />
                </div>
                <div class="form-group">
                    <label class="control-label">Section</label><br />
                    <input type="radio" value="Primary" id="chkPrimary" runat="server" name="Section"  required="required" disabled="disabled"/> <label class="control-label">Primary</label><br />
                    <input type="radio" value="Secondary" id="chkSecondary" runat="server" name="Section"  required="required" disabled="disabled"/> <label class="control-label">Secondary</label>
                </div>
                <div class="form-group">
                    <label class="control-label">Standard</label>
                    <input maxlength="12" type="text" required="required" class="form-control" placeholder="Enter Standard of the Related Student" id="txtStandard" runat="server" disabled="disabled"/>
                </div>
                <div class="form-group">
                    <label class="control-label">Division</label>
                    <input maxlength="12" type="text" required="required" class="form-control" placeholder="Enter Division of the Related Student" id="txtDivision" runat="server" disabled="disabled"/>
                </div>

jquery snippet

        <script type="text/javascript">
            $('#chkRelatedStudentYes').click(function () {
                $('#txtRelatedStudentName').removeAttr("disabled");
                $('#chkPrimary').removeAttr("disabled");
                $('#chkSecondary').removeAttr("disabled");
                $('#txtStandard').removeAttr("disabled");
                $('#txtDivision').removeAttr("disabled");
            });
            $('#chkRelatedStudentNo').click(function () {
                $('#txtRelatedStudentName').attr("disabled", "disabled");
                $('#chkPrimary').attr("disabled", "disabled");
                $('#chkSecondary').attr("disabled", "disabled");
                $('#txtStandard').attr("disabled", "disabled");
                $('#txtDivision').attr("disabled", "disabled");
            });
</script>

Answer 1

Since the html elements is rendered on the server, the IDs of the elements will change. While access the IDs in javascript, Please use as following:

$('#<%# chkRelatedStudentYes.ClientID%>').removeAttr("disabled");

Answer 2

I found what the problem was. The script wasn't able to find the element by ID or its NAME attribute. I tried all the possible way to fire the script on click of the element and realized that it was working when i used - $("input[type=radio]:radio") and also using the class name - $(".form-control") I modified the script and used the below script and boom it worked

$("input[type=radio]:radio").click(function () {
    if ($(this).val() == 'yes') {
        $(".form-control-disable").removeAttr("disabled");
            }
    else if ($(this).val() == 'no') {
        $(".form-control-disable").attr("disabled", "disabled");       
            }
});     

I used the following class for the text and radio controls that had to be disabled ".form-control-disable" and it worked. I thank Abhi for his patience and help. :)

Answer 3

Hi your way of triggering event is wrong

Please try this, here is complete code that should work

Note : Tested it

 $(document).ready(function() {
        $("input[name=RelatedStudent]:radio").click(function() { // attack a click event on all radio buttons with name 'radiogroup'


                if($(this).val() == 'yes') {//check which radio button is clicked 
                        $('#txtRelatedStudentName').removeAttr("disabled");
                $('#chkPrimary').removeAttr("disabled");
                $('#chkSecondary').removeAttr("disabled");
                $('#txtStandard').removeAttr("disabled");
                $('#txtDivision').removeAttr("disabled");
                } else if($(this).val() == 'no') {
                      $('#txtRelatedStudentName').attr("disabled", "disabled");
                $('#chkPrimary').attr("disabled", "disabled");
                $('#chkSecondary').attr("disabled", "disabled");
                $('#txtStandard').attr("disabled", "disabled");
                $('#txtDivision').attr("disabled", "disabled");
                } 
        });
});

You can try it here https://jsfiddle.net/abhiyx/fgen1br9/

Answer 4

You could use jQuery prop() method instead of removeAttr(). Try this -

$('#chkRelatedStudentYes').click(function () {
   $('#txtRelatedStudentName').prop("disabled", false);
   $('#chkPrimary').prop("disabled", false);
   $('#chkSecondary').prop("disabled", false);
   $('#txtStandard').prop("disabled", false);
   $('#txtDivision').prop("disabled", false);
});