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Editorial Team
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Asked: 2026-06-06T19:50:43+00:00

I am trying to make a BMI Calculator using HTML. The inputs come from

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I am trying to make a BMI Calculator using HTML. The inputs come from text fields. I am making some calculation with them in a Javascript function. I want to get the calculated values in a span like this:

<span id="" class="">Your Calculation Results is = </span>
<span id="" class="">   "" I want the result here ""    </span>

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Edit : The part that i am asking about

<script language="javascript">
var bmi = document.getElementById("ID_bmiResult2").innerHTML;
bmi.value = weight / (heightInMeter * heightInMeter);
</script>

<body>
<span id="ID_bmiResult2">  </span>
</body>

i don’t know how to make it …

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1 Answer

  1. Editorial Team

    Edit: As it was pointed out, FF doesn’t like innerText, so I’m replacing to innerHTML which in this particular case doesn’t not change the overall functionality of the script.

    You can get the 2nd span and pass the value directly to innerHTML like this:

    document.getElementsByTagName('span')[1].innerHTML= 'the result';

    Note: Consider using and id or class so you can find the exact element you need to change instead of retrieving several elements of that type (in this case span).
    If you had an id, it would be like this:

    document.getElementById('the id goes here').innerHTML= 'the result';

    Edit2: This edit was made after the OP changed his question
    It got really confusing now that I’m seeing your code.
    I’ve written this fiddle so you can see it working

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