var activ;
var mmTimeOut = null;

path_activ = 'canal';
path_img = 'img/menu/';
path_txt = 'img/menu/';
extension = '.png';
page_container = 'ctl00_';


function MM_HideMenu() {
  mmTimeOut = setTimeout("MM_HideMenuNow();", 1000);
}

function MM_ShowMenu(img) {
	if (mmTimeOut) clearTimeout(mmTimeOut);
	mmTimeOut = null;
	if (activ) {
		MM_HideMenuNow();
	}
	
	activ = page_container + img;
	
	document.getElementById(page_container + img).style.visibility = 'visible';	
}

function MM_HideMenuNow() {
  document.getElementById(activ).style.visibility = 'hidden';
  
  activ = '';
}