I am having problem of floating the div when reducing the windows screen size. What I would like to achieve is I have two div side by side, both div are floating left. When I reduce the browser windows screen size, and the right div will move to the bottom of the left div. Please see the screenshots below:


At first, two divs are displayed side by side. After reduce the Browser windows size, the right div content will move to the bottom of the left div.
Use a parent div, and fix the size of the children: http://jsfiddle.net/zV9ea/