function cambiar (num, div, divMenu) {
	var num;
	var div;
	var divMenu;

	var i=0;
	
	
	
	for (i=2; i <= 8; i++)
	{
	div0 = document.getElementById('m'+i);
	div0.style.display = 'none';
	}
	for (y=1; y <= 8; y++)
	{
	div1 = document.getElementById('menu'+y);
	div1.style.display = 'none';
	}
	div = document.getElementById(div);
	div.style.display = 'block';
	switch(num)
	{
		case "1":
			div2 = document.getElementById('sub');
			div2.style.height = '19px';
		break;
		case "2":
			div2 = document.getElementById('sub');
			div2.style.height = '24px';
		break;
		case "3":
			div2 = document.getElementById('sub');
			div2.style.height = '24px';
		break;
		case "4":
			div2 = document.getElementById('sub');
			div2.style.height = '24px';
		break;
		case "5":
			div2 = document.getElementById('sub');
			div2.style.height = '24px';
		break;
		case "6":
			div2 = document.getElementById('sub');
			div2.style.height = '24px';
		break;
		case "7":
			div2 = document.getElementById('sub');
			div2.style.height = '19px';
		break;
		case "8":
			div2 = document.getElementById('sub');
			div2.style.height = '19px';
		break;
	}
	
	divMenu = document.getElementById(divMenu);
	divMenu.style.display = 'block';
}
function volver (num, div, divMenu) { 
	var num;
	var div;
	var divMenu;	
}