#num1 a {
background: url(images/arch.png) no-repeat top;
width: 84px;
height: 78px;
cursor: pointer;
display: block;
}
#num1 a.current {
background-image: url(images/arch_on.png);
}

#num2 a {
background: url(images/devel.png) no-repeat top;
width: 102px;
height: 78px;
cursor: pointer;
display: block;
}
#num2 a.current {
background-image: url(images/devel_on.png);
}
#num3 a {
background: url(images/bsa.png) no-repeat top;
width: 89px;
height: 78px;
cursor: pointer;
display: block;
}
#num3 a.current {
background-image: url(images/bsa_on.png);
}


.tabcontainer{
clear: left;
width:100%; /*width of 2nd level sub menus*/
height:1.5em; /*height of 2nd level sub menus. Set to largest's sub menu's height to avoid jittering.*/
}

.tabcontent{
display:none;
}