CSS horizontal, vertical, center alignment
Use CSS properties to achieve various alignments, such as left alignment, center alignment, right alignment, vertical center alignment, etc.
##Method 1:Use float attributes to set left and right alignment
实例 php.cn 此DIV靠左对齐显示
Method 2:Use margin attribute for center alignment
Only required Addmargin:0 autoto the style to be centered.
实例 php.cn 此DIV居中对齐显示
Method 3:Use the position attribute to set left and right alignment
实例 php.cn 此DIV右对齐显示
Use Multi-attribute vertical center alignment:
实例 php.cn 完全居中：
利用css定位规则，设置左右、上下方向定位为0，margin为auto
