Add a Value in Checkbox and Textbox

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How will I add the value of my checkbox to the value in my textbox? If the checkbox is checked, then it's value is added to the stotal, if not it will be ignored?

HTML

HTML

<input type="text" id="sff" value="10.57"/>
<input type="text" id="osf" value="100.25"/>
<input type="checkbox" id="cb1" value="35.00"/>
<input type="text" id="total"/>

JavaScript

function subtotal(){
	var a = $("#sff").val();
	var b = $("#osf").val();
	
	var stotal = parseFloat(a, 10)+ parseFloat(b, 10)+ parseFloat(cbtotal, 10);
    $('#total').val('$' + stotal.toFixed(2));
}

Posted 8-Dec-14 14:41pm

missMarie

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Peter Leow · Answer 1 · 2014-12-08T15:58:00

Try this:

<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
</head>
<body>

<input type="text" id="sff" value="10.57" >
<input type="text" id="osf" value="100.25" >
<input type="checkbox" id="cb1" value="35.00">
<input type="text" id="total" >

<script>
$('#cb1').click(function(){
	var a = $("#sff").val();
	var b = $("#osf").val();
        var stotal = parseFloat(a)+ parseFloat(b);
    
    if($(this).is(':checked')){
       stotal = stotal + parseFloat($('#cb1').val());
    }

    $('#total').val('$' + stotal.toFixed(2));
})

</script>
</body>
</html>

DamithSL · Answer 2 · 2014-12-08T16:07:00

JavaScript

function subtotal() {
    var a = $("#sff").val();

    var b = $("#osf").val();
    var c = 0;
    if ($('#cb1').is(":checked")) {
        c = parseFloat($("#cb1").val(), 10);
    }
    var stotal = parseFloat(a, 10) + parseFloat(b, 10) + c ;

    $('#total').val('$' + stotal.toFixed(2));
}

ajith srikukan · Answer 3 · 2014-12-23T19:09:00

C#

//If the checkbox is checked, then it's value is added to the stotal, if not it will be blank.

function subtotal(){
    var a = $("#sff").val();
    var b = $("#osf").val();

    var stotal = parseFloat(a, 10)+ parseFloat(b, 10);
    $('#total').val('$' + stotal.toFixed(2));
}

$(document).ready(function(e){
    $('#cb1').change(function() {
        $('#total').val('');
        if($(this).is(":checked")) {
            subtotal();
        }
    });
});

Add a Value in Checkbox and Textbox

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