pic_01 = new Image();
pic_01.src="img/li_01.gif";
pic_02 = new Image();
pic_02.src="img/li_02.gif";
pic_03 = new Image();
pic_03.src="img/li_03.gif";
pic_04 = new Image();
pic_04.src="img/li_04.gif";
pic_05 = new Image();
pic_05.src="img/li_05.gif";