How can I sum the values inside the checkbox?

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I have a problem that I can't solve. I'm trying to make a code that make a sum of radio and checkbox buttons. When I select some choices in the checkbox selection it doesn't work how it should be.

------------------------------------------

HTML

<!DOCTYPE html>
<html>
<body>
<script type="text/javascript">
        function DisplayPrice(price){
            var val1 = 0;
            for( i = 0; i < document.form1.price.length; i++ ){
                if( document.form1.price[i].checked == true ){
                    val1 = document.form1.price[i].value;
                }
            }

            var val2 = 0;
            for( i = 0; i < document.form2.price2.length; i++ ){
                if( document.form2.price2[i].checked == true ){
                    val2 = document.form2.price2[i].value;
                }
            }

	    var val3 = 0;
            for( i = 0; i < document.form3.price3.length; i++ ){
                if( document.form3.price3[i].checked == true ){
                    val3 = document.form3.price3[i].value;
                }
            }

            var sum=parseInt(val1) + parseInt(val2) + parseInt(val3);
            document.getElementById('totalSum').value=sum;
        }
    </script>
</head>
<body>
    <b><u>Group 1:</u></b>
    <br>
    <form name="form1" id="form1" runat="server">
        <br>
        <input id="rdo_1" type="radio" value="1000" name="price" onclick="DisplayPrice(this.value);">Choice 1 - € 1.000,00
        <br>
        <input id="rdo_2" type="radio" value="2000" name="price" onclick="DisplayPrice(this.value);">Choice 2 - € 2.000,00
        <br>
        <input id="rdo_3" type="radio" value="5000" name="price" onclick="DisplayPrice(this.value);">Choice 3 - € 5.000,00
        <br>
        <p></p>
    </form>

    <b><u>Group 2:</u></b>
    <br>
    <form name="form2" id="form2" runat="server">
        <br>
        <input id="rdo_1" type="radio" value="100" name="price2" onclick="DisplayPrice(this.value);">Choice 1 - € 100,00
        <br>
        <input id="rdo_2" type="radio" value="200" name="price2" onclick="DisplayPrice(this.value);">Choice 2 - € 200,00
        <br>
        <p></p>
    </form>

<b><u>Group 3:</u></b>
    <br>
    <form name="form3" id="form3" runat="server">
        <br>
        <input id="rdo_1" type="checkbox" value="100" name="price3" onclick="DisplayPrice(this.value);">Choice 1 - € 100,00
        <br>
        <input id="rdo_2" type="checkbox" value="200" name="price3" onclick="DisplayPrice(this.value);">Choice 2 - € 200,00
        <br>
	<input id="rdo_1" type="checkbox" value="450" name="price3" onclick="DisplayPrice(this.value);">Choice 3 - € 450,00
        <br>
	<input id="rdo_1" type="checkbox" value="600" name="price3" onclick="DisplayPrice(this.value);">Choice 4 - € 600,00
        <br>
	<input id="rdo_1" type="checkbox" value="750" name="price3" onclick="DisplayPrice(this.value);">Choice 5 - € 750,00
        <br>
        <p></p>
    </form>

<input type="text" name="totalSum" id="totalSum" value="" size="3" readonly="readonly">

</body>
</html>

What I have tried:

I tried to make different checkboxes but it didn't work so I tried to transform the checkbox buttons into radio buttons but it didn't work too...

Posted 21-Feb-18 23:14pm

Bertons

Updated 22-Feb-18 0:10am

Patrice T

v3

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Karthik_Mahalingam · Accepted Answer · 2018-02-22T00:11:00

Solution 1

correction

var val3 = 0;
           for (i = 0; i < document.form3.price3.length; i++) {
               if (document.form3.price3[i].checked == true) {
                   val3 += parseInt( document.form3.price3[i].value);
               }
           }

Demo: Plunker[^]

Posted 22-Feb-18 0:11am

Karthik_Mahalingam