function secBoard(g,m,n) 
{  z=g+1;
    for(i=1;i<z;i++) 
    { 
        eval("document.getElementById('cl_"+g+""+m+""+i+"').className='Label1'"); 
        eval("document.getElementById('tbx_"+g+""+m+""+i+"').style.display='none'"); 
    } 
    eval("document.getElementById('cl_"+g+""+m+""+n+"').className='Label2'"); 
    eval("document.getElementById('tbx_"+g+""+m+""+n+"').style.display='block'"); 
}