function DesativaMenu(menu)
{
    
    if (document.all) 
    { 
      meu_menu = document.all[menu].style;
      hidden = 'hidden'; 
      visible = 'visible';
      if (meu_menu.visibility == visible) 
        { 
          meu_menu.visibility = hidden; 
        } 
    }   
    if (document.layers) 
    { 
      meu_menu = document.layers[menu];
      hidden = 'hide'; 
      visible = 'show'; 
      if (meu_menu.visibility == visible) 
        { 
          meu_menu.visibility = hidden; 
        } 
    } 
}

function AtivaMenu(menu) 
{ 
    if (document.all) 
    { 
      meu_menu = document.all[menu].style;
      hidden = 'hidden'; 
      visible = 'visible'; 
      if (meu_menu.visibility != visible) 
        { 
          meu_menu.visibility = visible; 
        } 
    } 
    if (document.layers) 
    { 
      meu_menu = document.layers[menu];
      hidden = 'hide'; 
      visible = 'show'; 
      if (meu_menu.visibility != visible) 
        { 
          meu_menu.visibility = visible; 
        } 
    } 	
} 

function mOut(src,fundo) {
	if (!src.contains(event.toElement)) {
  		src.style.cursor = 'default';
 		src.background  = fundo;
 	 }
}
	
function mOvr(src,fundo) {
	if (!src.contains(event.fromElement)) {
		src.style.cursor = 'hand';
		src.background  = fundo;
	 }
}