.tabcontainer{
clear: left; /*width of 2nd level sub menus*/
height:30px;
font-family:Verdana, Arial, Helvetica, sans-serif;
font-size:11px;

 /*height of 2nd level sub menus. Set to largest's sub menu's height to avoid jittering.*/
}

.tabcontent{
display:none;
background-image:url(../img/bgsubnav.png);
background-position:top;
background-repeat:repeat-x;
height:30px;
width:926px;

}