/* submenu1 */ 
function showsm1() {
   document.getElementById("submenu1").style.visibility = "visible";
   document.getElementById("naviitem1").style.backgroundImage = "url(res/img/navi/bkgd_navi1_active.gif)";
}

function hidesm1() {
   document.getElementById("submenu1").style.visibility = "hidden";
   document.getElementById("naviitem1").style.backgroundImage = "url(res/img/navi/bkgd_navi1_inactive.gif)";
}

/* submenu2 */ 
function showsm2() {
   document.getElementById("submenu2").style.visibility = "visible";
   document.getElementById("naviitem2").style.backgroundImage = "url(res/img/navi/bkgd_navi2_active.gif)";
}

function hidesm2() {
   document.getElementById("submenu2").style.visibility = "hidden";
   document.getElementById("naviitem2").style.backgroundImage = "url(res/img/navi/bkgd_navi2_inactive.gif)";
}

/* submenu3 */ 
function showsm3() {
   document.getElementById("submenu3").style.visibility = "visible";
   document.getElementById("naviitem3").style.backgroundImage = "url(res/img/navi/bkgd_navi3_active.gif)";
}

function hidesm3() {
   document.getElementById("submenu3").style.visibility = "hidden";
   document.getElementById("naviitem3").style.backgroundImage = "url(res/img/navi/bkgd_navi3_inactive.gif)";
}

/* submenu4 */ 
function showsm4() {
   document.getElementById("submenu4").style.visibility = "visible";
   document.getElementById("naviitem4").style.backgroundImage = "url(res/img/navi/bkgd_navi4_active.gif)";
}

function hidesm4() {
   document.getElementById("submenu4").style.visibility = "hidden";
   document.getElementById("naviitem4").style.backgroundImage = "url(res/img/navi/bkgd_navi4_inactive.gif)";
}

/* submenu5 */ 
function showsm5() {
   document.getElementById("submenu5").style.visibility = "visible";
   document.getElementById("naviitem5").style.backgroundImage = "url(res/img/navi/bkgd_navi5_active.gif)";
}

function hidesm5() {
   document.getElementById("submenu5").style.visibility = "hidden";
   document.getElementById("naviitem5").style.backgroundImage = "url(res/img/navi/bkgd_navi5_inactive.gif)";
}

/* submenu6 */ 
function showsm6() {
   document.getElementById("submenu6").style.visibility = "visible";
   document.getElementById("naviitem6").style.backgroundImage = "url(res/img/navi/bkgd_navi6_active.gif)";
}

function hidesm6() {
   document.getElementById("submenu6").style.visibility = "hidden";
   document.getElementById("naviitem6").style.backgroundImage = "url(res/img/navi/bkgd_navi6_inactive.gif)";
}