// JavaScript Document
   function secBoard1(n)  {

    for(i=1;i<=4;i++){
    var obj=document.getElementById("t" + i);
       if(obj)
        obj.className="c1_title_bg2";
    }

    document.getElementById("t" + n).className="c1_title_bg1";



      for(i=1; i<=4; i++){
          document.getElementById("b" + i).style.display="none";
      }

      document.getElementById("b" + n).style.display="block";

  }
   function secBoard2(n)  {

    for(i=11;i<=12;i++){
    var obj=document.getElementById("t" + i);
       if(obj)
        obj.className="c1_title_bg2";
    }

    document.getElementById("t" + n).className="c1_title_bg1";



      for(i=11; i<=12; i++){
          document.getElementById("b" + i).style.display="none";
      }

      document.getElementById("b" + n).style.display="block";

  }
   function secBoard3(n)  {

    for(i=21;i<=22;i++){
    var obj=document.getElementById("t" + i);
       if(obj)
        obj.className="c2_bs_bg2";
    }

    document.getElementById("t" + n).className="c2_bs_bg1";



      for(i=21; i<=22; i++){
          document.getElementById("b" + i).style.display="none";
      }

      document.getElementById("b" + n).style.display="block";

  }
   function secBoard4(n)  {

    for(i=31;i<=36;i++){
    var obj=document.getElementById("t" + i);
       if(obj)
        obj.className="c3_title_bg2";
    }

    document.getElementById("t" + n).className="c3_title_bg1";



      for(i=31; i<=36; i++){
          document.getElementById("b" + i).style.display="none";
      }

      document.getElementById("b" + n).style.display="block";

  }
   function secBoard5(n)  {

    for(i=41;i<=44;i++){
    var obj=document.getElementById("t" + i);
       if(obj)
        obj.className="c4_title_bg2";
    }

    document.getElementById("t" + n).className="c4_title_bg1";



      for(i=41; i<=44; i++){
          document.getElementById("b" + i).style.display="none";
      }

      document.getElementById("b" + n).style.display="block";

  }