var pg_actual = '';
var oj_actual;

			var mat_names = new Array();
			mat_names[0] = 'bt_somos';
			mat_names[1] = 'bt_creemos';
			mat_names[2] = 'bt_hacemos';
			mat_names[3] = 'bt_contacto';
			mat_names[4] = 'bt_weare';
			mat_names[5] = 'bt_webelieve';
			mat_names[6] = 'bt_andwedo';
			mat_names[7] = 'bt_contact';



			var mat_on = new Array();
			var mat_off = new Array();


			for (imgro=0;imgro<mat_names.length;imgro++) {
				mat_on[imgro] = new Image();
				mat_on[imgro].src = 'images/' + mat_names[imgro] + '_on.gif';
				mat_off[imgro] = new Image();
				mat_off[imgro].src = 'images/' + mat_names[imgro] + '_of.gif';
			}

cambiadaimg = false;
	function rollon(cual) {
		elemento = cual.src;
		var elementorc = elemento.substr(elemento.lastIndexOf('\/')+1);
        elementorc2 = elementorc.replace("of_","on_");
        if (elementorc != elementorc2) {
            cual.src = 'images/popup/' + elementorc2;
            cambiadaimg = true;
        }

	}

	function rolloff(cual) {
		elemento = cual.src;
		var elementorc = elemento.substr(elemento.lastIndexOf('\/')+1);
        elementorc2 = elementorc.replace("on_","of_");
        if (cambiadaimg) {
		    cual.src = 'images/popup/' + elementorc2;
            cambiadaimg = false;
        }
	}

	function arranque() {
			img_nav = document.getElementById('menu').getElementsByTagName('UL')[0].getElementsByTagName('A');
			for (cnav=0;cnav < img_nav.length;cnav++) {
				img_nav[cnav].getElementsByTagName('IMG')[0].onmouseover =  function(){rollon(this)};
				img_nav[cnav].getElementsByTagName('IMG')[0].onmouseout =  function(){rolloff(this)};
			}
	}