[gaurav_sting]

hello friends,
i have a query, please help me out.

supposingly, a user is registering himself online. after filling the form the user clicks on the submit button.

Now after processing the form variables(thru PHP script), it comes out that say--a user id already exists with the name user has entered in the html form.

i am able to validate that whether the user has filled out the form or not. But the problem is that whenever i click back, the form is not able to retain the data which user has entered earlier. I want that the user should not re-enter the same data already entered.
please help me find the solution.

thanx
Gaurav