<html><head> <style> #maincontent { width:500px; float:left; background-color:red; } .leftchunk { float:left; background-color:orange; width:250px; height:300px; } .rightchunk { float:left; background-color: red; } #child1 { width:250px; float:left; height:40px; background-color: yellow; } #child2 { float:left; clear:left; width:250px; height:260px; background-color: olive; } </style> </head> <p>You should see a 500x300 rectangle with orange, yellow and olive rects. No red should be visible or the test has failed. </p> <div id="maincontent"> <div class="leftchunk"></div> <div class="rightchunk"> <div id="child1"></div> <div id="child2"></div> </div>