在这点（text-overflow:ellipsis ）上IE支持得最早，opera用 -o-text-overflow:ellipsis 来模拟CSS3中的 text-overflow:ellipsis。

</p> <style tyep="text/css"> <p>div {margin:5px 0;overflow:hidden;width:200px;}</p> <p>div.a {border:1px solid red; text-overflow:ellipsis;white-space:nowrap;}</p> <p>div.b {border:1px solid green; text-overflow:ellipsis;-o-text-overflow:ellipsis;white-space:nowrap;}</p> <p>div.c {border:1px solid blue; text-overflow:ellipsis;-o-text-overflow:ellipsis;}</p> </style> <div class="a">test somthing here.test somthing here.test somthing here.test somthing here.test somthing here.</div> <div class="b">test111 1111111111111112133435te st1111111111111111112133435 test111111 111 111111 11121 334353 5345345</div> <div class="c">test1111111111111111112133435test1111111111111111112133435test111111111111111111213343535345345</div> <div class="c">test 11111 1111111 1111112133 435te t111 111111 1111111112133435 test1111111111 111111112 13343 53 5345345</div> <p> [Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]

opera（8212） 支持得最多..

</p> <style tyep="text/css"> <p>input {background: #fff;}</p> <p>input:read-only {background: red;}</p> <p>input[type="checkbox"] {background:green;}</p> <p>input:checked {background:yellow}</p> <p>input:disabled {background:pink}</p> <p>option:default {background:#bluesky;}</p> </style> <input value="1234" readonly="readonly" /> <input value="1234" /> <input /> <input type="checkbox" /> <input disabled="disabled" /> <hr /> <select> <p><option default>选项1</option></p> <p><option>选项2</option></p> <p><option>选项3</option></p> </select> <p> [Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]

IE(sp2)和opera(

</p> <style> <p>#test {</p> <p> background-image: url('javascript:alert("css里的js");')</p> <p>}</p> </style> <div id="test">1111</div> <p> [Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]

http://www.listible.com/list/essential-tips-and-tricks-for-css

opera 也推出每周 build 版本 - opera weekly build

The release of Opera 9 Preview 2 marks the start of a new tradition: The Weekly Builds. Every week until the final version of Opera 9 is ready, we intend to ship a weekly updated version of Opera 9 on this blog.

The goal is to further open up our development process to our devoted users and allow you to be more involved at an earlier stage than when we ship the next public beta.

The Weekly Builds are snapshots, they are not as thoroughly tested as a Technology Preview or a Public Beta. You should only use these builds if you are not afraid of losing data (e-mail, bookmarks, anything) or crashing your computer.

注意：网友反映，可能会导致 IE 6 不能使用。请查阅此方法的升级版本 继续使用绿色IE7 的方法！！

IE 7 默认安装会把 IE6 升级，也就是说 IE 6 就没有了。要回到 IE6 只能 添加|删除程序 （显示更新）反安装。而我还需要 IE 6 来调试代码，郁闷…另外，安装IE7也需要微软正版验证（windows genuine ）…

找到一个无须安装的绿色 IE7 使用方法：

1.下载官方 IE 7 beta IE7B2P-WindowsXP-x86-enu.exe

2.不要直接执行，用 winzip（我是7-zip）解压到一个目录中，比如 ie7 目录

3.打开这个文件夹，新建 - 文本文件，命名为 iexplore.exe.local，注意：不是 iexplore.exe.local.txt

4.在该文件夹内删除以下内容：

　　update目录下的全部文件

　　install.ins

　　spmsg.dll

　　spuninst.exe

　　spupdsvc.exe

5.直接运行该目录中的 iexplore.exe 即可。

注：我的 ie 6 sp2(xp sp2)和 win2k3都可以正常使用。据下面这篇文章，ie 6 sp1 可能会有问题，大约是删除注册表的相关项目即可。

以下为引用内容:

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We have received scattered reports of users experiencing odd browser behavior after installing our most recent security update. Some of you have reported opening a browser window that promptly hangs IE, others have reported opening links that render blank, and finally we have reports of multiple windows opening when initiating a browser session. After investigating several of these reports, we have traced these issues to a common source.

If a user has ever attempted to run IE7 Beta1 in an unsupported side-by-side configuration with a version of IE6, IE7 Beta1 puts a registry key on the machine the first time a user executes the IE7 version of IEXPLORE.EXE. This key is part of an normal IE7 installation on XP, and will not be configured correctly if an unsupported side-by-side install is used. When IE7 is installed using the installer, the key should be removed properly upon uninstall. A machine can also load this registry key and not remove it during a failed IE7 installation.

To address this issue on a machine running IE 6 SP1 with our most recent security update, locate and delete this entire key from the registry of the affected machine: HKEY_CLASSES_ROOTCLSID{c90250f3-4d7d-4991-9b69-a5c5bc1c2ae6}. If you are running IE7 Beta1 in a side-by-side scenario with another version of IE, this is not a supported scenario. Please uninstall and reinstall IE7 Beta1 in the recommended manner.

Thank you all for your blog comments reporting this incident. Your valuable feedback allowed us to locate this issue in IE7 Beta1 and investigate how to prevent the problem in future.

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via IE December Security Update

有问题，可以尝试添加删除（显示更新组件）