*{margin:0px;padding:0px;}
#wrapper{margin:50px auto;width:600px;height:600px;background:#5f5f5f;border:2px solid black;}
header{width:100%;height:80px;background:pink;}
#content{width:100%;height:440px;}


/** layout 1 **/
#layout1 #content-left{width:20%;height:440px;background:#eee;float:left;}
#layout1 #content-center{width:60%;height:440px;background:green;float:left;}
#layout1 #content-right{width:20%;height:440px;background:olive;float:left;}
footer{width:100%;height:80px;background:blue;}