function menu1_display()
{
menu1.style.display="none";
menu2.style.display="block";
menu3.style.display="none";
menu4.style.display="none";
menu5.style.display="none";
menu6.style.display="none";
}

function menu2_display()
{
menu1.style.display="block";
menu2.style.display="none";
menu3.style.display="none";
menu4.style.display="none";
menu5.style.display="none";
menu6.style.display="none";
}

function menu3_display()
{
menu1.style.display="none";
menu2.style.display="none";
menu3.style.display="block";
menu4.style.display="none";
menu5.style.display="none";
menu6.style.display="none";
}

function menu4_display()
{
menu1.style.display="none";
menu2.style.display="none";
menu3.style.display="none";
menu4.style.display="block";
menu5.style.display="none";
menu6.style.display="none";
}

function menu5_display()
{
menu1.style.display="none";
menu2.style.display="none";
menu3.style.display="none";
menu4.style.display="none";
menu5.style.display="block";
menu6.style.display="none";
}

function menu6_display()
{
menu1.style.display="none";
menu2.style.display="none";
menu3.style.display="none";
menu4.style.display="none";
menu5.style.display="none";
menu6.style.display="block";
}

function all_close1()
{
menu1.style.display="none";
menu2.style.display="none";
menu3.style.display="none";
menu4.style.display="none";
menu5.style.display="none";
menu6.style.display="none";
}