preload_img = new Image();
preload_img.src = 'images/common/button_menu1_2.gif';
preload_img2 = new Image();
preload_img2.src = 'images/common/button_menu2_2.gif';
preload_img3 = new Image();
preload_img3.src = 'images/common/button_menu3_2.gif';
preload_img4 = new Image();
preload_img4.src = 'images/common/button_menu4_2.gif';
preload_img5 = new Image();
preload_img5.src = 'images/common/button_menu5_2.gif';
preload_img6 = new Image();
preload_img6.src = 'images/common/button_menu6_2.gif';

preload_img7 = new Image();
preload_img7.src = 'images/common/step1_sanchi_2.gif';
preload_img8 = new Image();
preload_img8.src = 'images/common/step2_nyuka_2.gif';
preload_img9 = new Image();
preload_img9.src = 'images/common/step3_senbetsu_2.gif';
preload_img10 = new Image();
preload_img10.src = 'images/common/step4_hiraki_2.gif';
preload_img11 = new Image();
preload_img11.src = 'images/common/step5_yaki_2.gif';
preload_img12 = new Image();
preload_img12.src = 'images/common/step6_tare_2.gif';
preload_img13 = new Image();
preload_img13.src = 'images/common/step7_kome_2.gif';
preload_img14 = new Image();
preload_img14.src = 'images/index/banner_oseibo_2.gif';