function preload(){(new Image).src="../images/arrows02.gif";(new Image).src="../images/btn_concept_on.jpg";(new Image).src="../images/btn_kimono_on.jpg";(new Image).src="../images/btn_lesson_on.jpg";(new Image).src="../images/btn_top_on.jpg"}function button(a){document.getElementById("arrows").setAttribute("src",a)}function button02(a){document.getElementById("arrows02").setAttribute("src",a)}function button03(a){document.getElementById("arrows03").setAttribute("src",a)}function button04(a){document.getElementById("arrows04").setAttribute("src",a)}function button05(a){document.getElementById("btn_top").setAttribute("src",a)}function button06(a){document.getElementById("btn_concept").setAttribute("src",a)}function button07(a){document.getElementById("btn_lesson").setAttribute("src",a)}function button08(a){document.getElementById("btn_kimono").setAttribute("src",a)}function button09(a){document.getElementById("arrows05").setAttribute("src",a)}