.clear{clear:both;}
#wrapper{width:1000px;background:yellow;}
#header{width:100%;height:100px;background:red;}
.inner_wrapper{width:100%;}
#left{width:200px;height:300px;background:yellow;float:left;}
#content{width:200px;height:300px;background:cyan;float:left;}
#left_side_bar{width:200px;height:300px;background:brown;float:left;}
#right_side_bar{width:200px;height:300px;background:orange;float:right;}
#first{width:200px;height:300px;background:green;float:right;}