//EJEMPLOS:
//addGenericEventListener(window, 'load', setContainerSize, false);
//addGenericEventListener(window, 'load', function () { alert('loaded'); }, false);
function addGenericEventListener(element, type, expression, bubbling) {
    bubbling = bubbling || false;
    if (window.addEventListener) { // Standard
        element.addEventListener(type, expression, bubbling);
        return true;
    } else if (window.attachEvent) { // IE
        element.attachEvent('on' + type, expression);
        return true;
    } else
        return false;
}

function openNewWindow(url) {
    var temporalForm = window.document.forms[0];
    //var temporalForm = window.document.createElement('form');
    temporalForm.setAttribute('method', 'GET');
    temporalForm.setAttribute('action', url);
    temporalForm.setAttribute('target', '_blank');
    temporalForm.submit();
    //window.document.body.removeChild(temporalForm);
}