jQuery code example to implement the Enter key (Enter) to switch the focus of the text box_jquery

jQuery(function () {
jQuery('input:text:first').focus( );//Directly locate the first text box of the current page
var $inp = jQuery('input:text');//All text boxes
$inp.bind('keydown', function ( e) {
var key = e.which;
if (key == 13) {
e.preventDefault();
var nxtIdx = $inp.index(this) 1;
            jQuery(":input:text:eq(" nxtIdx ")").focus();
                                                                                                                                                                  jQuery(":input:text:eq(" nxtIdx ")").focus();