Unwanted blank space problem Options

[soom]

Hello to everyone, I'm new and it's my first post. I made a website for a friend, with my little knowledge of webdesign and related languages. I just finished the job and want to go online but have problem in almost all pages with unwanted blank space, often presents inside layout text box, at the end of the text and other times the bank space is over the layout text box, causing problem of page stretching. I will attach photo to explain better the problem. In case i can also attach the code if needed. Thanks to all for help