function start()
{
item1.style.visibility="hidden";
item2.style.visibility="hidden";
item3.style.visibility="hidden";
item4.style.visibility="hidden";
item5.style.visibility="hidden";
item6.style.visibility="hidden";
item7.style.visibility="hidden";
}
function change1_over()
{
item1.style.visibility="visible";
}
function change1_out()
{
item1.style.visibility="hidden";
}
function change2_over()
{
item2.style.visibility="visible";
}
function change2_out()
{
item2.style.visibility="hidden";
}
function change3_over()
{
item3.style.visibility="visible";
}
function change3_out()
{
item3.style.visibility="hidden";
}
function change4_over()
{
item4.style.visibility="visible";
}
function change4_out()
{
item4.style.visibility="hidden";
}
function change5_over()
{
item5.style.visibility="visible";
}
function change5_out()
{
item5.style.visibility="hidden";
}
function change6_over()
{
item6.style.visibility="visible";
}
function change6_out()
{
item6.style.visibility="hidden";
}
function change7_over()
{
item7.style.visibility="visible";
}
function change7_out()
{
item7.style.visibility="hidden";
}