You've also got another parse error on this line:
$con = mysql_connect("localhost", "******", "******",);
caused by an extra comma at the end of the function parameter list.
However, the fact that you claim "nothing happens" suggests an even bigger problem - your environment isn't set up for debugging/developing. For example, in the development environment, you should probably have error_reporting set to E_ALL and display_errors set to On. Otherwise, you'll probably miss helpful error messages PHP is trying to give you, such as:
Parse error: syntax error, unexpected ')' in <file> on line 3
(the error message I got when I ran a lint check on your code snippet above).