are you using php? if so, its fairly simple:
for example, you want to make a page that adds two numbers.
page one:
< form action= "page2.php" >
First number< input type="text" name="Add1" > < br >
Second number < input type="text" name="Add2" > < br >
< input type="submit" value="add_numbers">
< /form >

page two
< ? php
$variable1= $_POST["Add1"];
$variable2= $_POST["Add2"];
$answer = $variable1 + $variable2;
echo $answer;
? >

I hope that made sense. U2U me if you have other questions.
---Pineapple
[edit on 6-2-2005 by pineappleupsidedown]