Solution to the failure of using CSS to control DIV centering_html/css_WEB-ITnose

1. Generally, DIV centering fails because the DTD statement is not written

Add at the top of the page:

　!DOCTYPE html PUBLIC "- //W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"＞

　That's it! In fact, many other CSS problems are also caused by not adding dtd statements.

2. Use margin to center the DIV

The simplest way to write it is:

.divstyle{ margin:0 auto; }

The more complicated one is Add both left and right margins:

　.divstyle{ margin-left:auto; margin-right:auto; }

 Then you can try to center the DIV!