validation check

[Li Jenny]

I would like to do a validation check for textbox field.
only let the user input number range or just a number in the following format:

1) 11,12
2)1-10,11-20
if the user input 1 to 10, or other than the above format, then prompt a msg.

[Amit Vinod Dali]

You can use JavaScript RegExp Object. Regular Expression generator

[Li Jenny]

how to use this.?

[David Newton]

Write a regular expression and use it to check the input--what does your regex look like so far?