function photo(image,layName,width,height){
  document.write('<img src="../images/spacer.gif" width="' + width + '" height="' + height + '" border="0" alt="" id="');
  document.write(layName);
  document.write('"><br>');

  if(document.getElementById) {        //e5,e6,n6,n7,m1,o6,o7,s1用
    document.getElementById(layName).style.backgroundImage 
       = (image=='')?'':'url(../images/gallery_img/' + image + '.jpg)';
  } else if(document.all) {              //e4用
    document.all(layName).style.backgroundImage='url(../images/gallery_img/' + image + '.jpg)';
  } else if(document.layers) {           //n4用
    document.layers[layName].background.src=(image=='')?null:'../images/gallery_img/' + image + '.jpg';
  }
}