Click the arrow once to increment or decrement once. Click and hold to increase or decrease the count rapidly. This script supports minimum and maximum values (append a class to the input box such as "min_1_max_25") and filters out non-numeric values.
View source of this page to see how the technique is accomplished.
The CSS used here:
This code is licensed under the Creative Commons Attribution 3.0 United States License. You are permitted to redistribute and/or modify this work for commercial or noncommercial purposes provided proper attribution to the original author (me) is present in the redistribution.