Many popular sites have mobile versions that are optimized for devices such as the iPad. While occasionally useful, mobile sites often lack the features of the desktop versions of the same site. Luckily, most (but not all) mobile websites can be disabled. First, confirm that the site you are viewing is a mobile site (this can be denoted by a m, mobile, or mobi web address prefix or suffix). Then, delete this extension. Alternatively, some sites may have a button that you can press to redirect you to the full site.
NOTE: For some sites like Facebook, there is no way to disable the mobile version.
Have fun with your iPad!