A project I did recently, I chose to use IE in IE, IETester is not very smooth to use, so I will consider other simple methods. Now win7 installs IE11 browsers, but sometimes we need to use IE10, IE9, IE8, IE7, browse in mode, how to switch it, let's explain it below.
1. First, open the IE browser, click F12 on the keyboard, and you will see the following figure: Developer interface
2. Select the [Simulation] button to enter the developer simulation interface.
3. Select in the document mode (select IE according to the need), if it is IE8, select "8" user agent string selection (select IE according to the need to switch) If it is IE8, select "IE8", and the browser will enter IE8 browse mode