function activateMenuTree(lastElement){
	var activePath = lastElement.split('_');
	var prefix = '';
	
	for (i in activePath) {
		if (activePath.hasOwnProperty(i)) {
	  
	  		if (prefix != '') {
				prefix += '_' + activePath[i];
	  		} else {
	  			prefix += activePath[i];
	  			continue;
	  		}
	  	
	  		element = document.getElementById(prefix);
	  	
	  		if (element) {
	  			element.style.display = 'block';
	  		}
		}
	}
}