How do you get the dots over German letters when typing?

You can go to http://german.typeit.org/ and just copy and past or while holding the alt key down type 132 on the Numbers Keypad. Release the Alt key and ä appears. If you made an error use backspace once. This does not work with the numbers across the top of the keyboard. This method works with many word processors and HTML editors but not with all.

ä 132 Ä 142 ö 148 Ö 153 ü 129 Ü 154 ß 225