Our website is slightly slow when navigating from page to page. We just moved it to a private server but its still slightly slow. The page pops up not as a whole but layer by layer. The first 1/3 page would pop up then other products. The company that built our website is telling us its slow b/c we have alot of products? Is there a way to make the entire page pop up together more faster. The website is designed in php.