First of all, drop internet explorer, it's a terrible browser that reads web code incorrectly. Even up to the newest IE10, is NOT on par with chrome or firefox. This isn't an opinion, it's a fact.
Second, if you are heck bent on using internet explorer & prefer your web code to be read incorrectly, or you prefer to support microsoft and use their backwards browser that's been holding been web standards for years then reinstall internet explorer. To reinstall/reset it do the following:
- Open internet explorer
- Click "tools" at top, then "internet options", you will get a window that opens
- On this window click the "advanced" tab.
- About half way down that tab you should see a button that says "reset". Click it.
- Suggestions include deleting the personal info also (the checkbox) to default everything without having to uninstall, reinstall, download the program.
My suggestion is really to switch off internet explorer, it is a terrible browser that isn't written to web standards, it's designed to microsofts view of what web standards are.
Anyways, let me know if this fixes your issue if you are planning to stay on the insecure and faulty web browser.