function autoTab(element, nextElement, e) { var doAutoTab = true; // This code allow for the shift tab if (e != undefined) { var key = (window.event) ? event.keyCode : e.which; if (key == 0) { doAutoTab = false; } else if (key == 9) { doAutoTab = false; } else if (key == 16) { doAutoTab = false; } } if (doAutoTab) { if (element.value.length == element.maxLength && nextElement != null) { element.form.elements[nextElement].focus(); } } }