Hello
How can I make connection betwewn ComboBox and Button.

Example:
ComboBox contains 3 choices, they are A,B and C.

I have this code:
echo "<form action=file.php method=post>";

"file.php" is a variable according to ComboBox choice.

When I choose "A",
echo "<form action=a.php method=post>";

When I choose "B,
echo "<form action=b.php method=post>";

But wen I choose "C",
echo "<form action=c.php method=post>";


Did you get it?
How can I do it?
Thanks & Regards