function startmenuapertura()
{
document.getElementById('menu1').style.display = "block";
document.getElementById('menu2').style.display = "none";
document.getElementById('menu3').style.display = "none";
document.getElementById('menu4').style.display = "none";
}
function startmenu()
{
document.getElementById('menu1').style.display = "none";
document.getElementById('menu2').style.display = "none";
document.getElementById('menu3').style.display = "none";
document.getElementById('menu4').style.display = "none";
}
function menufunc(menuId)
{
if(document.getElementById(menuId).style.display == "none")
{
startmenu();
document.getElementById(menuId).style.display = "block";
}
else
{
startmenu();
}
}