jquery calculation question
<p>I have this code: </p>

<pre><code>&lt;div&gt;
    &lt;input id="number" type="text" /&gt;

    &lt;select id="Selection" name="D1"&gt; 
    &lt;option&gt;Plus 1&lt;/option&gt;
    &lt;option&gt;Minus 1&lt;/option&gt;
    &lt;/select&gt;

    &lt;input id="result" type="text" /&gt;
    &lt;/div&gt;
</code></pre>

<p>How could I calculate any number entered into the input "number" based on the value chosen from the select control using jQuery? 
For example I would like to enter 5 in the input "number" and if I choose "Plus 1" then add 1 to the number and show the result in the "result" input. If I choose "Minus 1" then I will do a substraction and show the new result.
thank you.</p>
