function newImage(arg) {
if (document.images) {
rslt = new Image();
rslt.src = arg;
return rslt;
}
}

function changeImages() {
if (document.images && (preloadFlag == true)) {
for (var i=0; i<changeImages.arguments.length; i+=2) {
document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
}
}
}

var preloadFlag = false;
function preloadImages() {
if (document.images) {
top_menubar_top_o = newImage("images/top_menubar_top_o.gif");
top_menubar_01_o = newImage("images/top_menubar_01_o.gif");
top_menubar_02_o = newImage("images/top_menubar_02_o.gif");
top_menubar_03_o = newImage("images/top_menubar_03_o.gif");
top_menubar_04_o = newImage("images/top_menubar_04_o.gif");
top_menubar_05_o = newImage("images/top_menubar_05_o.gif");
top_menubar_06_o = newImage("images/top_menubar_06_o.gif");
top_menubar_07_o = newImage("images/top_menubar_07_o.gif");

top_menu_01_o = newImage("images/top_menu_01_o.gif");
top_menu_02_o = newImage("images/top_menu_02_o.gif");
top_menu_03_o = newImage("images/top_menu_03_o.gif");
top_menu_04_o = newImage("images/top_menu_04_o.gif");
top_menu_05_o = newImage("images/top_menu_05_o.gif");
top_menu_06_o = newImage("images/top_menu_06_o.gif");
top_menu_07_o = newImage("images/top_menu_07_o.gif");

top_header_nyukai_o = newImage("images/top_header_nyukai_o.gif");

preloadFlag = true;
}
}