function menuItem (name, width, height) {
this.on = new Image();
this.on.src = "site_img/" + name + "on_04.gif"
this.off = new Image();
this.off.src = "site_img/" + name + "off_04.gif"
}

function menu_new (name) {
menuItem[name] = new menuItem(name);
}

function img_act (imgName) {
    if (document.images) document[imgName].src = menuItem[imgName].on.src;
}

function img_inact (imgName) {
    if (document.images) document [imgName].src = menuItem[imgName].off.src;
}

function load_menu (name, num) {
for (i = 1; i <= num; i++) menu_new(name + i);
}

if (document.images != null) load_menu ('menu', 6);

function clearField(field){ if (field.value == field.defaultValue) {  field.value = ""; } }
function checkField(field){ if (field.value == "") { field.value = field.defaultValue; } }
function pop(pPage,Opt) { popUpWin = window.open(pPage,'',Opt); }