function openCenteredWindow(url) {
    var myWindow;
    var width = 359;
    var height = 270;
    var left = parseInt((screen.availWidth / 2) - (width / 2));
    var top = parseInt((screen.availHeight / 2) - (height / 2));
    var windowFeatures = "width=" + width + ",height=" + height + ",status,scrollbars,left=" + left + ",top=" + top + "screenX=" + left + ",screenY=" + top;
    myWindow = window.open(url, "subWind", windowFeatures);
}

function setFocus(elemento) {

    var campo = document.getElementById(elemento);
    
    if(campo != null)
    campo.focus();

}