I want to check for non alpha and non digits in a string. I have not used a regular expression since my perl days (97) and I can't seem to put this together. From what I have found something like the not of [A-Za-z0-9] should do the trick. <BR><BR>I have a textbox with a validator control with this expression in it. When a user enters the first char it seems to work but a second char will return the error message. Seems like I need to enter a specal char to read the whole string.<BR><BR>Thanks for your help!