Okay, I need some help. I need to figure out how to make a website where a customer can be given an username and password, then sign in, and change things for their advertisement on my site. All they need to change are numbers on an ad for their hotel. For example, just a text box where they type the new rate, "89.95", and then it shows up on the ad in the correct font and color. Like the numbers that are circled in blue on this pic. I need to know if there are any books or websites that tell me exactly how to do this. Thanks.