text-align
This property sets the horizontal alignment of elements. Values are left, right, center, and justify. The default value is left. This property is similar to the align attribute available with HTML/ XHTML block-level tags such as <p>. Justification may produce poor results: showing white space "rivers" in large text bodies because of screen resizing.
Examples
.goleft {text-align: left;}
p {text-align: justify;}
h1.cent {text-align: center;}
Browser and CSS Support Notes
CSS1
IE 3, 4 (no justification), 5, 5.5, 6
Nav 4, 4.5-4.7 (quirks), 6, 7
Opera 4, 5, 6, 7