table.index_center_nav {margin:0 auto;}
table.index_center_nav td {padding:5px;}

table.index_center_nav td a {width:310px; height:100px; display:block;}
table.index_center_nav td a:hover {background-position:-310px 0px;}

a.nav_third_party_administrators {background:url('../img/index_buttons/third_party_administrators.gif');}
a.nav_health_spending_accounts {background:url('../img/index_buttons/health_spending_accounts.gif');}
a.nav_group_retirement_plans {background:url('../img/index_buttons/group_retirement_plans.gif');}
a.nav_employee_assistance_plans {background:url('../img/index_buttons/employee_assistance_plans.gif');}
a.nav_self_insurance_plans {background:url('../img/index_buttons/self_insurance_plans.gif');}
a.nav_executive_health_plans {background:url('../img/index_buttons/executive_health_plans.gif');}
a.nav_benefits_buying_groups {background:url('../img/index_buttons/benefits_buying_groups.gif');}
a.nav_us_employees {background:url('../img/index_buttons/us_employees.gif');}
a.nav_employee_benefits_centre {background:url('../img/index_buttons/employee_benefits_centre.gif');}
a.nav_executive_compensation {background:url('../img/index_buttons/executive_compensation.gif');}