Password Prompt And Cancel Button

I have a password script that prompts users for a password, the script works perfect, however, when you click on cancel, it begins the loop again and you can't exit the prompt unless you know the password. It's an internal site so I don't care if it's not that secure. What first occurs is the user clicks on the submit button in a text form, when that occurrs, the password prompt apears, I need the user to be able to click on the cancel button, which will also cancel the submit request and then gets redirected to the same site, like a refresh. I'm not that great with if and else statements, so it may be the problem, or I may need a entire new script.