Bản mẫu:Cảnh báo/doc

This is the  message box. It should be used sparingly and only for  Less important comments should be put as regular text on the page's talk page instead.

**Usage**
This box automatically changes its style depending on what kind of page it appears; see Mbox for details, and view the examples below for demonstrations.

**Use in talk and userspace**
Outside "important" locations like mainspace, policy pages, and noticeboards, this message box can also be used on other pages in a more relaxed way, such as on the top of talk page alerts, wikiproject pages, userspace pages, etc. Talk and noticeboard cases should probably include your signature at the end of the template's main content.

**Optional parameters**
The box can be titled with an optional heading (or header or title). This is left-aligned by default. This:
produces an all-left notice:
It can be hard to notice or read short heading and/or message on a wide monitor when they centered. For long content, it can be centered with center.
This:
produces:
A shorthand parameter to center the heading and main text at the same time is y. This:
produces:
The parameter textstyle can be used to pass arbitrary inline CSS to the main note content. For example, one could center small-caps text below a left-aligned heading; this:
produces:
Similarly, the parameter headstyle can be used to pass arbitrary inline CSS to the heading content. For example, one could center a red heading above a left-aligned message; this:
produces:
The message box can also take an image parameter (with a value of just the bare filename of the image, without File:..., Image:..., or markup), but this is discouraged in articles. For an example of its use, see below.
See #Talk pages, below for the talkpage-only y parameter. See also #Adding an image, shortcuts, etc., on the righthand side for additional parameters that work in talk and project pages but not articles.

**Articles**
  produces:

**Talk pages**
On talk pages,  produces:
You may also set the talkpage-only parameter yes, which alters the template's appearance thus:
  produces ......
Setting the image parameter changes the image shown on the lefthand side of the template.
  produces:
(Note the effect of omitting text-align:center; here)

**File and category pages**
on a File: page would produce...  ... and, on a Category: page, would produce:  

**Other pages**
On other pages, such as those in the User:, Wikipedia: and Help: namespaces,  would produce:

**External links and equals signs**
In most cases, external links can be used in the template without any complications. If a link – or any text – contains one or more equals signs (" = "), however, everything before the first sign will be interpreted as the name of a parameter. To prevent this, name the text carrying the link as the first numbered parameter:
  produces:

**Adding an image, shortcuts, etc., on the righthand side**
To add shortcuts, images, other templates, etc. to the righthand side of the template, use imageright. This does not work in articles. For example, produces:
includes the Shortcuts template providing links to You and Me:

**Alternate shortcut option**
As an alternative to imageright, the shortcut (or shortcut1) and shortcutN parameters (where  to 5) may be used to display shortcuts. For instance,  produces:
Note: If both imageright and any of the shorcut parameters are used, the contents of imageright will override the shortcut/s. For example, produces: