#num1 a {
background: url(images/arch.png) no-repeat top;
width: 100px;
height: 87px;
cursor: pointer;
display: block;
}
#num1 a:hover.current {
background-image: url(images/arch_on.png);
}
#num1 a:hover {
background-image: url(images/arch_over.png);
}
#num1 a.current {
background-image: url(images/arch_on.png);
}

#num2 a {
background: url(images/devel.png) no-repeat top;
width: 92px;
height: 87px;
cursor: pointer;
display: block;
}
#num2 a:hover.current {
background-image: url(images/devel_on.png);
}
#num2 a:hover {
background-image: url(images/devel_over.png);
}
#num2 a.current {
background-image: url(images/devel_on.png);
}
#num3 a {
background: url(images/bsa.png) no-repeat top;
width: 95px;
height: 87px;
cursor: pointer;
display: block;
}
#num3 a:hover.current {
background-image: url(images/bsa_on.png);
}
#num3 a:hover {
background-image: url(images/bsa_over.png);
}

#num3 a.current {
background-image: url(images/bsa_on.png);
}



#num4 a {
background: url(images/sm.png) no-repeat top;
width: 89px;
height: 87px;
cursor: pointer;
display: block;
}
#num4 a:hover.current {
background-image: url(images/sm_on.png);
}
#num4 a:hover {
background-image: url(images/sm_over.png);
}

#num4 a.current {
background-image: url(images/sm_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;
}