function hideLevel( _levelId) {
	var thisLevel = document.getElementById( _levelId );
	//var thisImg = document.getElementById( _imgId );
	thisLevel.style.display = "none";
}
	
//function showLevel( _levelId, _imgId ) {
function showLevel( _levelId) {
	var thisLevel = document.getElementById( _levelId );
	//var thisImg = document.getElementById( _imgId );
	if ( thisLevel.style.display == "none") {
		thisLevel.style.display = "block";
		//alturaVar('abre');
	}
	else {
		//hideLevel( _levelId, _imgId);
		hideLevel( _levelId);
		//alturaVar('cierra');
	}	
}
	
function showLevelAlta( _levelId) {
	var thisLevel = document.getElementById( _levelId );
	thisLevel.style.display = "block";
}