#mainPage{
margin-left: auto;
margin-right: auto;
background-color: #778899;
width:800px;
border: solid;
border-width: 3px;
border-color: #A9A9A9;
font-family: helvetica;

}
#mainHeader{
   width:800px;
   height: 100px;
   background-color: lightgrey;
   border-collapse: collapse;
   margin:0px;
   padding: 0px;
}
#mainNavBar{
   width:800px;
   height:50px;
   background-color: grey;
}
#mainNavBar ul{
    margin: 0;
    padding: 0;
}
#mainNavBar ul li{
    display: inline-block;
    list-style-type: none;
}
#mainNavBar ul{
    margin: 0;
    padding: 0;
}
#mainBody{
   width: 800px;
   height: 500px;
   background-color: lightgrey;
}
#mainFooter{
   width: 800px;
   background-color: lightgrey;
}
#copyrightInfo{
   text-align: justify;
}