var roll_image = new Array;
var image_link = new Array;
var small_img = new Array;

roll_image[0] = '/images/focuspic/01.jpg';
image_link[0] = '/logo/index.htm';
small_img[0]  = '/images/focuspic/main_btn_1_on.gif';

roll_image[1] = '/images/focuspic/02.jpg';
image_link[1] = '/vi/index.htm';
small_img[1]  = '/images/focuspic/main_btn_2_on.gif';

roll_image[2] = '/images/focuspic/03.jpg';
image_link[2] = '/baozhuang/packing.htm';
small_img[2]  = '/images/focuspic/main_btn_3_on.gif';

roll_image[3] = '/images/focuspic/04.jpg';
image_link[3] = '/fushi/index.htm';
small_img[3]  = '/images/focuspic/main_btn_4_on.gif';

var cliImg = '';
var cliImgSrc = '';
var imgNo = Math.round(Math.random() * 4);

var interval = 3000;
var setTime = '';

function click_simg(ci, no){
  var pImg = document.all.bigimg;
  var pLink = document.all.imglink;

  if(cliImg == '') {
    cliImg = ci;
    cliImgSrc = ci.src;
    ci.src = small_img[no];
    imgNo=no;
    pImg.src =roll_image[no];
    pLink.href = image_link[no];
  }
  else if(cliImg != ci) {
    cliImg.src = cliImgSrc;
    cliImg = ci;
    cliImgSrc = ci.src;
    ci.src = small_img[no];
    imgNo=no;
    pImg.src =roll_image[no];
    pLink.href = image_link[no];
  }
  clearTimeout(setTime);
  setTime=setTimeout("rotate()",interval);
}

function rotate() {
  imgNo = (imgNo >= 3) ? 0 : imgNo+1;
  var ci = eval('document.all.num_img'+imgNo);

  document.all.bigimg.filters.blendTrans.apply();
  document.all.imglink.href=image_link[imgNo];
  document.all.bigimg.src=roll_image[imgNo];
  document.all.bigimg.filters.blendTrans.play();

  if(cliImg == '') {
    cliImg = ci;
    cliImgSrc = ci.src;
    ci.src = small_img[imgNo];
  }
  else if(cliImg != ci) {
    cliImg.src = cliImgSrc;
    cliImg = ci;
    cliImgSrc = ci.src;
    ci.src = small_img[imgNo];
  }
  setTime=setTimeout("rotate()",interval);
}