As Adam said, IE7 is less standards compliant than other browsers, so get used to it displaying some things differently.
I recommend Adam's second suggestion.
Here are some of the sites Adam was referring
Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat. The purpose of this eBook is to educate the reader about ransomware attacks.
In this tutorial viewers will learn how to position overlapping items using z-index in CSS. They will also learn the restrictions on the z-index property.
Create a new HTML document with an internal stylesheet.: Create a div in CSS and name it Red.…
In this tutorial viewers will learn how to customize the background color and font color of highlighted text using the ::selection element in CSS
Begin by defining the selected text as an element in CSS by typing "::selection": Style the ::selection…