function show_text(id)
{
	if (document.getElementById('show'+id).style.visibility != "visible")
	{
		document.getElementById('show'+id).style.visibility = "visible";
		document.getElementById('show'+id).innerHTML=textarray[id];
	}
	else
	{
		document.getElementById('show'+id).style.visibility = "hidden";
		document.getElementById('show'+id).innerHTML='';
	}
}
function change_text(id,text)
{
	document.getElementById(id).innerHTML=text;
}