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Editorial Team
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Asked: 2026-06-04T22:47:57+00:00

I’ve got a javascript function <head> <title> Test </title> <script type=text/javascript> function GetResult() {

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I’ve got a javascript function

<head>
    <title>
        Test
    </title>
    <script type="text/javascript">
        function GetResult()
        {
            count = 0;
            for(var i=0;i<10;i++){
                for(var j=1;j<4;j++){
                    if (document.getElementById("label"+i+j).checked){
                        count +=1;
                    }
                }
            }
            if (count!=10)
                alert("Please answer all the questions");
            else alert(count);
        }
    </script>

In the code there are a lot of radiobutton. ther look like

<input type="radio" name="q1" value="1" id="label01"/>

But my javascript function never shows alert.
The button that is supposed to call function is

<input type="button" value="Result" onclick="GetResult()"/>

Maybe button doesn’t call GetResult?

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1 Answer

  1. Editorial Team

    To elaborate what Felix already said: Here is how you can check whether or not document.getElementById found the specified element (it will return null if it failed).

    for (var i = 0; i < 10; i++) {
    for (var j = 1; j < 4; j++) {
        // Store the result in a local variable
        var label = document.getElementById("label"+i+j);

        // Include a check whether "null" got returned
        if (label && label.checked) {
            count +=1;
        }
    }
}
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