JavaScript, oninput change innerHTML of option tag

i need to change the innerHTML text of a option tag, based on the input of an input form. I did it like this but as soon as i write “1” it gets locked up and i cannot write anything else there. It does change the text but it doesn’t allow you to write anything else, or change from 1 to the value of 2 for example.

function change_let_rok()
{
    if (document.kombpred.nn.value = "1") {
        document.kombpred.obdobi.options[0].innerHTML = "Rok";
    }
        else {
            document.kombpred.obdobi.options[0].innerHTML = "Let";
    }
}

The html code is:

<form name="kombpred">
<input style ="display:inline;" name=nn type=text size=15 class='innerc resform' oninput="change_let_rok()"> 
    <select name="obdobi" style="display:inline;">
    <option value="let">Let</option>
    <option value="mesice">Mesice</option>
    <option value="ctvrtlety">Ctvrtlety</option>
    <option value="pulroky">Pulroky</option>
    </select>
</form>

Answer

You only have 1 equals sign in your if statement. Should be ‘==’. Also your values for the options should probably be 1,2,3,and 4 respectively.

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Answer