function init() {
var tabs = document.getElementsByClassName('tabs');
	for (var i=0; i < tabs.length;i++) {
		$(tabs[i].id).onclick = function () {
			getTabData(this.id);
		}
	}
}
function getTabData(id) {
	var url='5/2/2/contenido.php';
	var rand = Math.random(9999);
	var pars = 'id=' + id + '&amp;rand=' + rand;
	var myAjax = new Ajax.Request( url, {method: 'get', parameters: pars, onLoading: showLoad, onComplete: showResponse} );
}
function showLoad () {
	$('load').style.display = 'block';
}
function showResponse (originalRequest) {
	var newData = originalRequest.responseText;
	$('load').style.display = 'none';
	$('content').innerHTML = newData;
}