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Html dropdown onchange function

I want to use the Dropdown onchange function in html to transfer the value, it works fine in the submit button, but I want to use Dropdown onchange onchange, Pls help how to do it?

<form method="post" action=" ">
    <div align="center">
        <select name="value">
            <option value="">Show Value</option><br />
            <option value="2"> 2  </option><br />
            <option value="5"> 5  </option><br />
            <option value="10"> 10 </option><br />
            <option value="20"> 20 </option><br />
        </select>
        <input type="submit" name="submit" value="Submit">
    </div>
</form>
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1 answer

you should add onChangeto an element <select>like this

<form method="post" action=" ">
    <div align="center">
        <select name="value" onChange="this.form.submit()">
            <option value="">Show Value</option><br />
            <option value="2"> 2  </option><br />
            <option value="5"> 5  </option><br />
            <option value="10"> 10 </option><br />
            <option value="20"> 20 </option><br />
        </select>
        <input type="submit" name="submit" value="Submit">
    </div>
</form>
+5
source

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