web part to check string text input as date and check for mm/dd/yyyy format.

web part to check string text input as date and check for mm/dd/yyyy format.

Say if its 01/13/2013 is entered it should check the if its in the proper format such as 1/13/2013.

for single digit numbers for dd and mm it should avoid zero

I want to programatically check a string for this pattern .

thanks