clear
This property specifies the placement of an element in relation to floating objects. Possible values are left, right, both, and none. The property acts much like the clear attribute for the <br> tag and continues to return until the left, right, or both columns are clear. The default value is none.
Examples
br.clearright {clear: right;}
#clearboth {clear: all;}
Browser and CSS Support Notes
CSS1
IE 4, 5 (buggy), 5.5, 6
Nav 4, 4.5-4.8 (buggy), 6, 7
Opera 5, 6, 7