function switchdisplay(id) 
{
var vett = document.getElementsByTagName("table");
var thisid = document.getElementById(id);

for(i=0;i<vett.length;i++)
{
	if(vett[i].style.display=="block" && vett[i]!=thisid)
		vett[i].style.display="none";
}


if(thisid)
{
	
	if (thisid.style.display=="none")
	{
		thisid.style.display="block";
	}
	else 
	{
		thisid.style.display="none";
	}
}

}