var imgDir="./s_images/";
  bt01=new Image;bt01.src=imgDir + "bt01a.gif";
  bt01_on=new Image;bt01_on.src=imgDir + "bt01b.gif";
  bt02=new Image;bt02.src=imgDir + "bt02a.gif";
  bt02_on=new Image;bt02_on.src=imgDir + "bt02b.gif";
  bt03=new Image;bt03.src=imgDir + "bt03a.gif";
  bt03_on=new Image;bt03_on.src=imgDir + "bt03b.gif";
  bt04=new Image;bt04.src=imgDir + "bt04a.gif";
  bt04_on=new Image;bt04_on.src=imgDir + "bt04b.gif";
  bt05=new Image;bt05.src=imgDir + "bt05a.gif";
  bt05_on=new Image;bt05_on.src=imgDir + "bt05b.gif";
  bt06=new Image;bt06.src=imgDir + "bt06a.gif";
  bt06_on=new Image;bt06_on.src=imgDir + "bt06b.gif";

function chgImg(name,chgImg){
  if(document.images){document.images[name].src=eval(chgImg+".src");}
}

function WinOpen(){
  window.open("/shinchiku/index.html","Win","toolbar=0,location=0,directories=no,status=0,menubar=0,scrollbars=no,resizable=0,width=450,height=300");
}