<html>
<body>
<form action="4-7.php" method="get">
:
<input type="text" name="userName" size="12">
:
<input type="text" name="pass" size="12">
<input type="submit" value="">
</form>
</body>
</html>
the very simple web page above, open
127.0.0.1 move 4-7.php
A drop-down box appears when the mouse clicks on the user name. Excuse me, how did the data in this drop-down box come from?