Troubleshooting IE7 and IE8 bug methods

Microsoft offers three types of parsing pages in IE8 IE8 Standard Modes: The default, the most standard mode, strictly according to the relevant rules of the Consortium

Microsoft offers three modes of parsing pages in IE8
IE8 Standard Modes: The default of the most standard mode, strictly in accordance with the relevant rules of the Consortium
IE7 Standards MODES:IE7 is now used to parse the Web page mode, open the organization is in Quirks MODES:IE5 used to parse the model of the Web page, the open authority is to delete the HTML top of the DOCTYPE declaration
Note: Pages in different modes can frame each other in IE8, therefore, because the DOM and CSS rendering is not the same, it will cause a lot of problems, it is important to note that if your page is IE7 compatible with no problem, and do not want to modify the existing code in large quantities, but also in the IE8 normal use, Microsoft said, Developers only need to add a line of code to the currently compatible IE7 Web site to solve the problem, as follows:

<meta http-equiv= "x-ua-compatible" content= "ie=7"/>
IE8 Latest CSS hack:

"\9" Example: "margin:0px auto\9;". Here the "\9" can distinguish all IE and Firefox.
"*" IE6, IE7 can be identified. IE8, Firefox can't.
"_" IE6 can Identify "_", IE7, IE8, Firefox can not.