function switch1(x)
{
if (document.getElementById('hit'))
{
var option=['hit'];
for(var i=0; i<option.length; i++)
{ obj=document.getElementById(option[i]);
obj.style.display=(option[i]==x)? "none" : "block"; }
}
}
function switch2(y)
{
if (document.getElementById('hit'))
{
var option=['hit'];
for(var i=0; i<option.length; i++)
{ obj=document.getElementById(option[i]);
obj.style.display=(option[i]==y)? "block" : "none"; }
}
}