*{margin:0;padding:0}
body{font-family:arial;font-size:13px;color:black}
#wrapper{width:100%;height:600px;margin:20px auto;width:800px;}
#menu {height:25px;}
#menu a{border:1px solid #000;padding:10px;}
#content{width:100%;height:600px;}
#home{width:100%;height:150px;background:pink;border:1px solid black;}
#about-us{width:100%;height:150px;background:pink;border:1px solid black;display:none}
#services{width:100%;height:150px;background:pink;border:1px solid black;display:none}
#contact-us{width:100%;height:150px;background:pink;border:1px solid black;display:none}