jQuery: Set background-color on focus with addClass

gistfile1

	// Add colorclass 'yellow' (background-color: #FFFF66) on focus to elements with class 'text'
	$('.text').on('focus', function(event) {
		$(this).addClass('yellow');
	});
	// Remove added colorclass 'yellow' on blur from elements with class 'text'
	$('.text').on('blur', function(event) {
		$(this).removeClass('yellow');
	});