*{margin:0px; padding:0px; border: 0px}
p{text-align: justify}
body {text-align: center}
#cabecera {background-color: white; border: black 1px solid; height: 210; width:900px}
#logotipo {background-color: white; width:300px; float:left; margin-top: 10px; margin-left: 5px}
#publicidad {background-color: white; width:485px; float:right; margin-top: 25px; margin-right: 20px; background-color: white}
#contenido  {background-color: #B5B5B5; width:900px; float:left; border: black 1px solid} p {padding: 10px 50px 10px 50px}
#global {width:900px ; margin:4px auto}
#menu {background-color: red; width:150px; float:left; text-align:left; margin:10px 50px 10px 50px; border: black 1px solid}
#menu li {list-style: none; margin: 4px 0px 4px 15px}
#menu h1 {}
a         {color:black; text-decoration:none; display:block}
a:link    {}
a:visited {}
a:hover   {color: black; text decoration: underline; background-color: silver}
a:active  {}
#servicios {margin: 50px 50px 50px 50px}