var myvar;
function menuinit() {
        document.getElementById('m1').style.display = 'none';
		document.getElementById('m2').style.display = 'none';
        document.getElementById('m3').style.display = 'none';
        document.getElementById('m4').style.display = 'none';
		document.getElementById('pm1').src = '/main/img/vermas_esp.jpg';
		document.getElementById('pm2').src = '/main/img/vermas_esp.jpg';
		document.getElementById('pm3').src = '/main/img/vermas_esp.jpg';
		document.getElementById('pm4').src = '/main/img/vermas_esp.jpg';
		}

function menuexpand (i) {
		menuinit();
        if (myvar == i) {
		document.getElementById('p' + i).src = '/main/img/vermas_esp.jpg';
		document.getElementById(i).style.display = 'none';
		myvar = '';
	}
        else {
		document.getElementById('p' + i).src = '/main/img/vercerrar_esp.jpg';
		document.getElementById(i).style.display = 'block';
		myvar = i;
	}
}