Two questions regarding <select> data manipulation

[Joeyeti]

Hi all programmers,

I am creating a simple webpage with an image in the background and multiple comboboxes (<select> tag) for the user to select values. Here is one of the comboboxes:

<select style="position:absolute; left:919px; top:288px; background-color: blue; color: white;" id="cze us" class="us">
<option selected>0 <option>1 <option>2 <option>3 <option>4 <option>5 <option>6 <option>7 <option>8 <option>9 <option>10 <option>11
</select>

I need to work with these selected values further and as I am quite a noob in HTML/Web programming, I have these questions:


1. How could I add values in multiple comboboxes selected, e.g. 1,3,2,6,0 together to a sum value with a button click?

2. Or would it be possible to make the addition interactive - e.g. once the user selects a different value in a combobox, the sum would be adjusted?

3. How could I store the current selections in multiple comboboxes in a txt file on the server and then recall it later?

Thx!

Joe

[WingedPanther]

Your code should really look more like this:

<select style="position:absolute; left:919px; top:288px; background-color: blue; color: white;" id="cze us" class="us">
  <option selected value="0">0</option>
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
  <option value="4">4</option>
  <option value="5">5</option>
  <option value="6">6</option>
  <option value="7">7</option>
  <option value="8">8</option>
  <option value="9">9</option>
  <option value="10">10</option>
  <option value="11">11</option>
</select>

Most of what you are talking about requires either JavaScript or server-side scripting.

[Xav]

If you can use PHP then you could automate the process of generating options:

PHP Code:

<select style="position:absolute; left:919px; top:288px; background-color: blue; color: white;" id="cze us" class="us">
<?php
for ($i = 0; $i <= 11; $i++)
{
  echo "<option selected value=\"$i\">$i</option>";

}
?>
</select>

[Joeyeti]

Thx guys,

could this then perhaps be moved to the PHP section to fit?
I would be interested in a PHP solution for the addition of the dropdown boxes...

[Xav]

If you want the items to be added without reloading the page, then you need to use JavaScript.

My code above was just to add the items when the user opens the page.