browser's conditional annotation theory, use the following example to explain this problem
X Html
The following code is a test of the effect of a conditional comment statement in Microsoft's IE browser
Copy Code code as follows:
<!--[If ie]>
<! [endif]-->
<!--[if IE 5]>
<! [endif]-->
<!--[if IE 5.0]>
<! [endif]-->
<!--[if IE 5.5]>
<! [endif]-->
<!--[if IE 6]>
<! [endif]-->
<!--[if IE 7]>
<! [endif]-->
The following code is a conditional comment that runs in non-IE browsers
Copy Code code as follows:
<!--[if! ie]><!-->
<!--<! [endif]-->
Ultimately works in non IE and special IE browsers
(or use the LTE LT or GT GTE to determine, such as:
<!--[If LTE IE 6]>
Information displayed under IE 6
<! [endif]-->
).
<!--[if IE 6]><!-->
or a non IE browser <!--<! [endif]-->
From:http://www.cssplay.co.uk/menu/conditional.html
Preview model
The above mentioned conditional annotation, which is to judge the browser type, and then to define what browser to display what content.
The Dropmenu (Pull-down menu) model is derived from Cssplay, which is made by the author's numerous studies and repeated tests. I think that this model to practice the principle of conditional annotation.
Let's look at one of the simplest models.
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