function showhide (itemname){

	var x,s;

	if (!itemname && itemname == '') return;

	x = document.getElementById ('submenuitem_'+itemname);

	if (!x ) return;

	if (x.style.display != "none") x.style.display = "none";

	else {s = x.getElementsByTagName('div');

	      if(s.length!=0) x.style.display = "block";}}

function resize(){

	var y;

	y = document.getElementById ('cont');

	y.style.height = eval(document.body.clientHeight-277)+"px";

	y = document.getElementById ('center_text');

	y.style.height = eval(document.body.clientHeight-301)+"px";}