function showhide(what){
	var result=0;	
	var i=1;
	var a;
		
	switch (what) {
		case "menu1": result = 22; break;
		case "menu2": result = 12; break;
		case "menu3": result = 5; break;
		case "menu4": result = 6; break;
	}
	
	for (i=1;i<=result;i++)
	{
	a = eval(what+"_"+i);	
	if (a.style.display=='none'){
		a.style.display='';
	}else{
		a.style.display='none';
	}
	}
}

function changeimg(what){
	if (what.src.substring(what.src.lastIndexOf('/')+1) == "close.gif"){
		what.src = "images/open.gif";
	}else{
		what.src = "images/close.gif";
	}
}