ValidationExpression for RegularExpression

[lukkynivas]

Hi, this is CNU ,can any body let me know what is the validationexpre ssion for following criteria
my text should contain At least one digit,6 to 12 chars and underscore
i gave like
(\w*[\d]+\w*)
but it is not checking range 6-12 chars
help me out
than'q
cnu

[nateraaaa]

Go to the following site. You should find what you need there.

http://regexlib.com/Search.aspx

Nathan

[lukkynivas]

i did't get any thing like that there
than'Q

[lukkynivas]

Thank U v'Much
i got exact what i want

((?!^[0-9]*$)(?!^[a-zA-Z]*$)^([a-zA-Z0-9]{6,12})$
atleast one digit
atleast one letter with underscore
length 6 to 12 char