hi, I want to know the following things. 1. How can we maintain referential integrity (rather check) using PHP Any example code will be helpful. 2. I want to display the column of the tables, how to do that. 3. I want to align the text and the text box on the page. 4. I also want to check the validation of text(numerical or text) Any example script would be helpful. thanks in advance. --------------------------------- Do you Yahoo!? Yahoo! Tax Center - File online by April 15th