.clear{clear:both;}
#wrapper{width:898px;height::598px;background:yellow;}

#header{width:100%;height:90px;background:pink;}

#content{width:100%;}

#one{width:299px;float:left;height:400px;background:cyan;}
#two{width:298px;float:left;height:400px;background:orange;}
#three{width:200px;float:left;height:400px;background:blue;}
#footer{width:100%;height:108px;background:green;}