<%@ page contentType="text/html;charset=GB2312"
   language="java" import="java.sql.*" %>
<%
   int len=20;     //JSP中的变量声明
   String[] univ=new String[len];
  String que;
                  
  Connection con=null; //下面的是JSP连接数据库的操作，你可以忽略
  String tableName="china2005";
  
   
   for(int i=0;i<len;i++)
    {
     try{
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
  con=DriverManager.getConnection("jdbc:odbc:researchEyes");
  Statement statement=con.createStatement();

  if(l==1)
          que="select count(researcherName)as coun from domainRe2 , " + tableName + " where domainRe2.synonym =" + tableName +".domain and " + tableName + ".university='" + univ[i] + "' and domainRe2.ACMlevel2='" + area[0] + "'";
           else if(l==2)
         que="select count(researcherName)as coun from domainRe2 , " + tableName + " where domainRe2.synonym =" + tableName +".domain and " + tableName + ".university='" + univ[i] + "' and domainRe2.ACMlevel3='" + area[0] + "' and domainRe2.ACMlevel2='" + area[1] + "'";
            else que="select count(researcherName)as coun from domainRe2 , " + tableName + " where domainRe2.synonym =" + tableName +".domain and " + tableName + ".university='" + univ[i] + "' and domainRe2.ACMlevel4='" + area[0] + "' and domainRe2.ACMlevel3='" + area[1] + "' and domainRe2.ACMlevel2='" + area[2] + "'";

      //out.println("<p>"+que+"</p>");
        
  ResultSet rs=statement.executeQuery(que);
  
   for(int j=0;rs.next();j++) 
     {
        number[i]=rs.getInt("coun");   //将查询数据库的结果传递给JSP变量
        count=count+number[i];
    }
  rs.close();
  con.close();
   }
 catch (Exception e)
    {
  out.println(e.getMessage());
    }
  }  
  out.println("<br>");
  out.println("<p class='style2'>total number of researchers:"+count+"</p>");
     
 
%>

<%for(int k=0;k<len;k++) //将JSP的变量传递给Javascript
 {  
   %>
   <script language="JavaScript">  
      var b=<%=number[k]%>;
   num[a]=b;
   //alert(num[a]);
   a=a+1;
  </script>
 <%}%>
上面的代码包含了JSP访问数据库获取数据并传递给Javascript的过程，已经调试通过了，看看对你有没有帮助。