function ObjLivello(livello){
  var objLiv,objLivss,objLivello,livTop,livHeight,livLeft,livWidth,nome;     
  this.nome=livello;          
  if (document.getElementById){ // NN>=6; MSIE>5	
    if (eval("document.getElementById('" + livello + "')")){	   	    
		  objLiv=eval("document.getElementById('" + livello + "')");
		  this.objLivss=objLiv;
		  this.livTop=parseInt(objLiv.style.top);
		  this.livHeight=parseInt(objLiv.offsetHeight);
		  this.livLeft=parseInt(objLiv.style.left);
		  this.livWidth=parseInt(objLiv.offsetWidth);			  		  
		  this.objLivello=objLiv.style;
	  }//fine if		
	}	
	else if (document.layers){ // NN<6	
	  if (eval("document.layers['" + livello + "']")){
		  objLiv=eval("document.layers['" + livello + "']");
		  this.objLivss=objLiv;
		  this.livTop=parseInt(objLiv.top);
			this.livHeight=parseInt(objLiv.clip.height);
		  this.livLeft=parseInt(objLiv.left);
		  this.livWidth=parseInt(objLiv.clip.width);			  
		  this.objLivello=objLiv;		  
	  }//fine if
	}
	else if (document.all){ // MSIE		
	  if (eval("document.all['" + livello + "']")){
		  objLiv=eval("document.all['" + livello + "']");
		  this.objLivss=objLiv;
		  this.livTop=parseInt(objLiv.style.top);
		  this.livHeight=parseInt(objLiv.offsetHeight);
		  this.livLeft=parseInt(objLiv.style.left);
		  this.livWidth=parseInt(objLiv.offsetWidth);		  
		  this.objLivello=objLiv.style;		  
	  }//fine if		
	}
		
}//fine function

function getObjLivello(livello){
    
  var ilLivello,oggettoLivello;   
  
  oggettoLivello= new ObjLivello(livello);
  ilLivello=oggettoLivello.objLivello;
   
  return ilLivello;
}//fine function

function help()
{
	var help_livello = getObjLivello("help");		
	if(help_livello.visibility=="visible")
	{
		help_livello.visibility="hidden";
	}
	else
	{
		help_livello.visibility="visible";
	}
}//fine function

function menuOnOff(strLivello)
{
	var menu_livello = getObjLivello(strLivello);		
	if(menu_livello.visibility=="visible")
	{
		menu_livello.visibility="hidden";
	}
	else
	{
		menu_livello.visibility="visible";
	}
}//fine function