ul#mainMenu{list-style-type: none; margin: 0; padding: 0; margin-top: 20px; text-align: center;}
ul#mainMenu li{position: relative;}
ul#mainMenu li a{color: #7797AC; margin-left: 15px; margin-right: 20px; display: block; width: 140px; height: 17px; border-bottom: 1px solid #D7D7D7; } 
ul#mainMenu li a{font-weight: bold; padding-top: 1px; padding-left: 10px; font-size: 100%; text-decoration: none;}
ul#mainMenu li a:hover{color: #000;}

ul#mainMenu ul{display: none; list-style-type: none; position: absolute; top: 0; left: 140px; margin: 0; padding: 0;}
ul#mainMenu ul a{background: #E7EFFF; border-bottom: none; border: 1px solid #D7D7D8; display: block; width: 110px; height: 15px;}

ul#mainMenu ul ul{display:none;}

ul#mainMenu li:hover ul{display: block;}
ul#mainMenu li:hover ul ul {display: none;}
ul#mainMenu li:hover ul ul ul{display: none;}

ul#mainMenu li li:hover ul{display: block;}
ul#mainMenu li li li:hover ul{display: block;}