i use the same page design for more than 1 page in my site do i have to change the code in each page or i can use the same code in more than 1 page ?
you can just use the same code..much better if you have a template to follow. so that you wont be changing anything but only the contents of your website..
That's no problem, you can either use the same code or different code, depend on what you like. Just dont change the code.