有谁能教我把这个电子商务程序改成：

1,在后台发布产品，能上传多张产品展示大图片（目前1张）

2,点击产品的缩略图显示多张产品的展示大图片及简介。

此程序：http://www.925ag.com.cn/cendy

小弟诚意求教，谢谢！

没空

看看这个有用吗？function smallit(){            
 var height1=PhotoViewer.images1.height;            
 var width1=PhotoViewer.images1.width;            
 PhotoViewer.images1.height=height1/1.2;            
 PhotoViewer.images1.width=width1/1.2;           
}            
         
function bigit(){            
 var height1=PhotoViewer.images1.height;            
 var width1=PhotoViewer.images1.width;            
 PhotoViewer.images1.height=height1*1.2;         
 PhotoViewer.images1.width=width1*1.2;           
}            
function fullit()
{
 var width_s=screen.width-10;
 var height_s=screen.height-30;
 window.open("Photo_View.asp?UrlID=<%=UrlID%>&PhotoID=<%=PhotoID%>", "PhotoView", "width="+width_s+",height="+height_s+",left=0,top=0,location=no,toolbar=no,status=no,resizable=no,scrollbars=yes,menubar=no,directories=no");
}
function realsize()
{
 PhotoViewer.images1.height=PhotoViewer.images2.height;     
 PhotoViewer.images1.width=PhotoViewer.images2.width;
 PhotoViewer.block1.style.left = 0;
 PhotoViewer.block1.style.top = 0;
 
}
function featsize()
{
 var width1=PhotoViewer.images2.width;            
 var height1=PhotoViewer.images2.height;            
 var width2=760;            
 var height2=500;            
 var h=height1/height2;
 var w=width1/width2;
 if(height1<height2&&width1<width2)
 {
  PhotoViewer.images1.height=height1;            
  PhotoViewer.images1.width=width1;           
 }
 else
 {
  if(h>w)
  {
   PhotoViewer.images1.height=height2;         
   PhotoViewer.images1.width=width1*height2/height1;           
  }
  else
  {
   PhotoViewer.images1.width=width2;           
   PhotoViewer.images1.height=height1*width2/width1;         
  }
 }
 PhotoViewer.block1.style.left = 0;
 PhotoViewer.block1.style.top = 0;
}

可惜我是菜鸟，不知道怎么把这段代码加进去！

请问遥忘：这段代码怎么插进去？谢谢