How do I set the focus to the first input element in an HTML form independent from the id?

Question

Is there a simple way to set the focus (input cursor) of a web page on the first input element (textbox, dropdownlist, ...) on loading the

Answer 1

This includes textareas and excludes radio buttons

$(document).ready(function() {
    var first_input = $('input[type=text]:visible:enabled:first, textarea:visible:enabled:first')[0];
    if(first_input != undefined){ first_input.focus(); }
});