enter qty and update total order
<p>Just making a very very simple order form.</p>

<p>Want a input box ( only accept numbers )</p>

<p>User enters a quantity , lets say 50</p>

<p>We have a multiplier value which is lets say 10</p>

<p>Want a disabled form field, showing the result of 50 x 10 </p>

<p>So form field would show 500</p>

<p>so now we have variable <strong>orderTotal</strong> we can pass to our code like:</p>

<pre>$txtAmount = "orderTotal";</pre>

<p>Any ideas ?</p>
