var menu_c = function()
{
	this.element_a = [];
	this.id_s = '';

	/**/

	this.setElement = function(id_s)
	{
		this.element_a[id_s] = document.getElementById(id_s);
	};

	this.setInvisible = function()
	{
		for (var index_s in this.element_a)
			if (this.element_a[index_s])
				this.element_a[index_s].style.display = 'none';
	};

	this.setElementVisible = function(id_s)
	{
		this.setInvisible();
		this.element_a[id_s].style.display = '';
		this.id_s = id_s;
	};

	this.getId = function()
	{
		return this.id_s;
	}
};