Calculating a date when a date has been chosen by the number of days
<p>I have three selection drop downs in a form comprising of day, month, year. Pretty standard.  Ive omitted all the individual select options for the purposes of this question.</p>

<pre><code>&lt;label for="start_date"&gt;Start Date&lt;font class="required"&gt;*&lt;/font&gt;:&lt;/label&gt;
&lt;select name="place_booking[day_val]"&gt;
&lt;select name="place_booking[month_val]"&gt;
&lt;select name="place_booking[year_val]"&gt;
</code></pre>

<p>Underneath this i have a selection for the number of days the client wishes to stay at the letting.</p>

<pre><code>&lt;label for="number_of_days"&gt;Number of Days&lt;font class="required"&gt;*&lt;/font&gt;:&lt;/label&gt;
&lt;select name="place_booking[number_of_days]"&gt;
</code></pre>

<p>Underneath there is a space to display the departure date based on there two selections above.</p>

<pre><code>&lt;label for="departure_date"&gt;Departure Date&lt;font class="required"&gt;*&lt;/font&gt;:&lt;/label&gt;
</code></pre>

<p>? - this bit i would like to display the calculated date after the above is selected</p>

<p>Any help would be grealty appreciated.  </p>
