function mouse_click(which) {
	switch(which){
	  case 1:document.images["car"].src="images-stepwgn-rk/01b.jpg";return false;
	  case 2:document.images["car"].src="images-stepwgn-rk/02b.jpg";return false;
	  case 3:document.images["car"].src="images-stepwgn-rk/03b.jpg";return false;
	  case 4:document.images["car"].src="images-stepwgn-rk/04b.jpg";return false;
	  case 5:document.images["car"].src="images-stepwgn-rk/05b.jpg";return false;
	  case 6:document.images["car"].src="images-stepwgn-rk/06b.jpg";return false;
	  case 7:document.images["car"].src="images-stepwgn-rk/07b.jpg";return false;
	  case 8:document.images["car"].src="images-stepwgn-rk/08b.jpg";return false;
	  case 9:document.images["car"].src="images-stepwgn-rk/09b.jpg";return false;
	  case 10:document.images["car"].src="images-stepwgn-rk/10b.jpg";return false;
	  case 11:document.images["car"].src="images-stepwgn-rk/11b.jpg";return false;
	  case 12:document.images["car"].src="images-stepwgn-rk/12b.jpg";return false;
	  case 13:document.images["car"].src="images-stepwgn-rk/13b.jpg";return false;
	  case 14:document.images["car"].src="images-stepwgn-rk/14b.jpg";return false;
	  case 15:document.images["car"].src="images-stepwgn-rk/15b.jpg";return false;
	  case 16:document.images["car"].src="images-stepwgn-rk/16b.jpg";return false;
	  case 17:document.images["car"].src="images-stepwgn-rk/17b.jpg";return false;
	  case 18:document.images["car"].src="images-stepwgn-rk/18b.jpg";return false;
	  case 19:document.images["car"].src="images-stepwgn-rk/19b.jpg";return false;
	  case 20:document.images["car"].src="images-stepwgn-rk/20b.jpg";return false;
	  case 21:document.images["car"].src="images-stepwgn-rk/21b.jpg";return false;
	  case 22:document.images["car"].src="images-stepwgn-rk/22b.jpg";return false;
	  case 23:document.images["car"].src="images-stepwgn-rk/23b.jpg";return false;
	  case 24:document.images["car"].src="images-stepwgn-rk/24b.jpg";return false;
	  default:break;
	}
}