Here’s how:

<script src="http://yige.org/static/js/j.js"></script>
jQuery(function () {
    jQuery('input:text:first').focus();//Navigate directly to the first text box on the current page
    var $inp = jQuery('input:text');//All text fields
    $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();
        }
    });
});