jQuery plugin to automatically set direction on input/textarea fields.

autodir.js

(function($) {
	$.fn.autodir = function() {
		return this.each(function() {
			$(this).on('keypress keyup change', function() {
				$(this).css('direction', $(this).val().match(/^[^a-z]*[^\x00-\x7E]/ig) ? 'rtl' : 'ltr');
			}).keyup();
		});
	};
})(jQuery);