div CSS compatible with Xiaojie_html/css_WEB-ITnose

The difference between IE6 and FF:
background:orange;*background:blue;
The difference between IE6 and IE7:
background:green !important;background:blue;
The difference between IE7 and IE7 FF:
background:orange; *background:green;
Difference between FF, IE7, IE6:
background:orange;*background:green !important;*background:blue;
IE7, IE8 compatible :

HEAD
1. Several browsers support different keywords in CSS, Can be redefined for browser compatibility
!important Can be recognized by FireFox and IE7
* Can be recognized by IE6 and IE7
_ Can be recognized by IE6
* Can be recognized by IE7
2. IE-specific conditional comments






3. Several Browser interpretation of actual pixels
IE/Opera: Actual width of object = (margin-left) width (margin-right)
Firefox/Mozilla: Actual width of object = (margin-left) (border- left-width) (padding- left) width (padding-right) (border-right-width) (margin-right)
4. Mouse gesture problem: FireFox’s cursor attribute does not support hand, but supports pointer, and both IE and All are supported; so for compatibility, pointer is used.
5. When setting the Style attribute of the HTML tag in FireFox, all position, width, height, and size values ​​must be followed by px. IE also supports this writing method, so the px unit is added uniformly. For example, Obj.Style.Height = imgObj.Style.Height 'px';
6. FireFox cannot parse the abbreviated padding attribute settings, such as padding 5px 4px 3px 1px; it must be changed to padding-top:5px; padding-right: 4px; padding-bottom:3px; padding-left:1px0;
7. When eliminating the indentation of lists such as ul and ol, the style should be written as: list-style:none;margin:0px;padding:0px;where margin The property is valid for IE, and the padding property is valid for FireFox
8. CSS control transparency: IE: filter:progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=60); FireFox: opacity:0.6;
9 . CSS control rounded corners: IE: does not support rounded corners;
FireFox: -moz-border-radius:4px; or
-moz-border-radius-topleft:4px;
-moz-border- radius-topright:4px;
-moz-border-radius-bottomleft:4px;
-moz-border-radius- bottomright:4px;
10. CSS double-line bump border: IE: border:2px outset;
FireFox:
-moz-border-top-colors: #d4d0c8 white;
-moz-border-left-colors: #d4d0c8 white;
-moz-border-right-colors :#404040 #808080;
-moz-border-bottom-colors:#404040 #808080;
11. IE supports the CSS method cursor:url() to customize the cursor style file and scroll bar color style; FireFox supports Neither of the above is supported
12. IE has a bug where the Select control is always on top, and all CSS does not work on the Select control
13. IE supports Label tags in Form, including images and text content ; FireFox does not support Label containing images. Clicking on an image will not cause the Radio or CheckBox labeled label for to have an effect
14. TextArea in FireFox does not support the onScroll event
15. FireFox does not support inline and block of display
16. When FireFox sets margin-left and margin-right to auto on Div, it is already centered, but it does not work in IE
17. When FireFox sets text-align on Body, Div needs to set margin: auto (mainly margin-left margin -right) before centering
18. It is best to set the CSS style of hyperlinks in this order: L-V-H-A. That is,

This can avoid that some hyperlinks after accessing will not have hover and active styles
19. Set the length in IE To automatically wrap paragraphs, set word-wrap:break-word in CSS; use JS insertion method in FireFox to achieve this. The specific code is as follows:

20. After adding the floating attribute to the sub-container, the container will not be able to open automatically
Solution: Add a Clear floating CSS clear:both;
21. 浮动后IE6解释外边距为实际边距的双倍
解决办法：加上display:inline
22. IE6下图片下方会有空隙
解决办法：为img加上display:block或设置vertical-align 属性为vertical-align:top | bottom |middle |text-bottom
23. IE6下两个层中间有空隙
解决办法：设置右侧div也同样浮动float:left或者相对IE6定义 margin-right:-3px;
24. LI中内容超过长度后以省略号的显示方法

25. 将元素的高度和行高设为相同值，即可垂直居中文本

26. 对齐文本与文本输入框，须在CSS中增加vertical-align:middle;属性设置

27. 支持WEB标准的浏览器设置了固定高度值就不会像IE6那样被撑开，但是又想设置固定高度又想能够被撑开呢?解决办法是去掉height属性而设置min-height，为了兼容不支持min-height的IE6可以这样定义：
{
height:auto!important;
height:200px;
min-height:200px;
}
28. web标准中IE无法设置滚动条颜色
解决办法：在CSS中对body的设置改为对html的

29. IE6由于默认行高问题无法定义1px左右高度的容器，
解决办法：在CSS中对容器设置如：overflow:hidden | zoom:0.08 | line-height:1px
30. 给Flash设置透明属性可使层显示在Flash之上