关于如何在JSP页面内传递参数请教
我想实现JSP一个页面内传递参数,页面分为上部分与下部分; 
    下部分是A,B,C,D实物的小图,比如,当点A时,上部分会从ACCESS数据库中调用出A的详细信息(A,B,C小图也是由ACCESS中调用出来的,运行决报错,请多多指教。。   
 程序如下: 
  <%@   page   contentType= "text/html;   charset=gb2312 "   language= "java "   import= "java.sql.* "   
errorPage= " "   %>  
  <html   xmlns= "http://www.w3.org/1999/xhtml ">  
  <head>  
  <meta   http-equiv= "Content-Type "   content= "text/html;   charset=gb2312 "   />  
  <title> 无标题文档 </title>  
  <link   href= "16.css "   rel= "stylesheet "   type= "text/css "   />  
  </head>    
  <body>  
  <% 
 Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver ");   //载入驱动程序类别 
 Connection   con   =   DriverManager.getConnection( "jdbc:odbc:jspdata ");   //建立数据库链接,jspdata为ODBC数据源名称 
 //建立Statement对象 
 Statement   stmt   =   con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, 
 ResultSet.CONCUR_READ_ONLY); 
 ResultSet   rs   =   stmt.executeQuery( "select   *   from   watch ");   //建立ResultSet(结果集)对象,并执行SQL语句 
 %>  
  <div   id= "container ">  
  <div   id= "left ">  
  <div   id= "logo ">  </div>  
  <div   id= "nav ">  
  <div   id= "menu ">  
  <ul>  
  <li>  <a   href= "# ">  <span   class= "a "> Home </span>  </a>  </li>  
  <li>  <a   href= "# ">  <span   class= "a "> Message   grom   CEO </span>  </a>  </li>  
  <li>  <a   href= "# ">  <span   class= "a "> Background </span>  </a>  </li>  
  <li>  <a   href= "# ">  <span   class= "a "> Brands </span>  </a>  </li>  
  <li>  <a   href= "# ">  <span   class= "a "> Watch   making          expertise </span>  </a>  </li>  
  <li>  <a   href= "# ">  <span   class= "a "> Values </span>  </a>  </li>  
  <li>  <a   href= "# ">  <span   class= "a "> Store </span>  </a>  </li>  
  <li>  <a   href= "# ">  <span   class= "a "> Contact </span>  </a>  </li>  
  </ul>  
  </div>      
  </div>  
  </div>  
  <div   id= "right ">  
  <div   id= "right_top ">  
  <div   id= "watch_logo ">  <img   src= "images/TRDC_new-logo-small.gif "   width= "316 "   height= "65 "   />  </div>  
  <% 
    String   picId   = " "; 
    if(request.getParameters( "nid ")   !=null) 
    { 
       picId   =   request.getParameters( "nid ");    
    }      
 %>         
  <div   id= "watch "   >  <img   src= "images/Fuego-orange21888-10-big.gif "   width= "