How to make IE8 default automatic invocation run in IE7 compatibility mode

As long as IE8 read this tag, it will automatically start the IE7 compatibility mode, to ensure the full display of the page ...

The hottest tag these days is not IE8
Browser vendors scramble to release version updates
Some Web pages also have compatibility issues with IE8
A simple line of code that allows IE8 to automatically invoke IE7 rendering mode
Just add the following HTTP Meta-tag to the page:

<meta http-equiv= "x-ua-compatible" content= "Ie=emulateie7"/>

As soon as IE8 reads this tag, it automatically starts the IE7 compatibility mode, ensuring that the page is fully displayed.
IE8 too close to FF3, Arisisi recommended use IE8 to do front-end development debugging environment, the main compatible IE8, do a framework with IETester test, each browser passed to continue to do the next. Pretty good.