if(navigator.appVersion.charAt(0) >=3) {
  img = new Array();

  img[10] = new Image();  img[10].src = "imgdata/b/photo1.jpg";
  img[20] = new Image();  img[20].src = "imgdata/b/bbs1.jpg";
  img[30] = new Image();  img[30].src = "imgdata/b/link1.jpg";
  img[40] = new Image();  img[40].src = "imgdata/b/pro1.jpg";
  img[11] = new Image();  img[11].src = "imgdata/b/photo2.jpg";
  img[21] = new Image();  img[21].src = "imgdata/b/bbs2.jpg";
  img[31] = new Image();  img[31].src = "imgdata/b/link2.jpg";
  img[41] = new Image();  img[41].src = "imgdata/b/pro2.jpg";

}

function _in(nam,num) {
  if(navigator.appVersion.charAt(0) >=3) {
  document.images[nam].src = img[num].src;
  }
}
function _out(nam,num) {
  document.images[nam].src = img[num].src;
}