function nis(url,newwin,coords) {
window.open(url,newwin,coords);
}

function HideContent(d) {
document.getElementById(d).style.display = "none";
}

function ShowContent(d) {
document.getElementById(d).style.display = "block";
}

function hideAll() {
HideContent('desk_menu')
HideContent('menu1')
HideContent('menu2')
HideContent('menu3')
}

function menu1() {
HideContent('menu2')
HideContent('menu3')
HideContent('desk_menu')
}

function menu2() {
HideContent('menu1')
HideContent('menu3')
HideContent('desk_menu')
}

function menu3() {
HideContent('menu1')
HideContent('menu2')
HideContent('desk_menu')
}

function desk_menu() {
HideContent('menu1')
HideContent('menu2')
HideContent('menu3')
}