I was wondering if someone can lend me a hand with some validation in ASP.NET<BR><BR>I have a textbox, and a submit button (small part of the page) the text box needs to be validated with the following:<BR>1. Can only be a number not any other character<BR>2. Can only be a number between 1 and 15<BR>3. The number can be a double but only in quaters...meaning that 1.25, 1.50, 1.75, 2.00...up to 15 is allowed...but 1.30 etc is not allowed.<BR><BR>I know I can do simple validation so that it must be a number, as well as a range for the number so it is 1-15..it is the third validation that I am not sure how to do..and yet at the same time can I incorporate all these validations into one..a custom validation?<BR><BR>Any help would be greatly appreciated!<BR><BR>Thanks!!!