/***************************by
garcon1986********************************/
区分
visibility:hidden
和
display:none
visibility:hidden
hides an element, but it will still take up the same space as before.
The element will be hidden, but still affect the layout.
Display: none
hides
an element, and it will not take up any space. The element will be
hidden, and the page will be displayed as the element is not there.
待续
几个css元素的简单解释 div ul dl dt oldiv，这个很常见，块级元素，div尽量少用，和table一样，嵌套越少越好
ol 有序列表。
<ol>
<li>……</li>
<li>……</li>
<li>……</li>
</ol>
表现为：
1……
2…& ......
