javascript - How to take selected option from select element in html and use it in js? -


i beginning write code. if wanted have user select option , have document store option chose, how that? example, if chose option 7, how have document write value? thank time!

<p> destination?    <select>        <option value="mercury">mercury</option>        <option value="venus">venus</option>        <option value="mars">mars</option>        <option value="jupiter">jupiter</option>        <option value="saturn">saturn</option>        <option value="uranus">uranus</option>        <option value="neptune">neptune</option>        <option value="pluto">pluto</option>    </select>    <script type="text/javascript">        var planets = new array(mercury, venus, mars, jupiter, saturn, uranus, neptune, pluto);        planets[0] = 48000000        planets[1] = 25000000        planets[2] = 33900000        planets[3] = 365000000        planets[4] = 1200000000        planets[5] = 2600000000        planets[6] = 2800000000        planets[7] = 4600000000    </script>  </p>

firs give select element id find by. try this:

var elm = document.getelementbyid('selectbox'); var selectedoption = elm.options[elm.selectedindex].value;

selectedoption contain value selected


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