function asecBoard(n) 
{ 
    for(i=1;i<2;i++) 
    { 
        eval("document.getElementById('al0"+i+"').className='a102'"); 
        eval("abx0"+i+".style.display='none'"); 
    } 
    eval("document.getElementById('al0"+n+"').className='a101'"); 
    eval("abx0"+n+".style.display='block'"); 
} 
function bsecBoard(n) 
{ 
    for(i=1;i<2;i++) 
    { 
        eval("document.getElementById('bl0"+i+"').className='b102'"); 
        eval("bbx0"+i+".style.display='none'"); 
    } 
    eval("document.getElementById('bl0"+n+"').className='b101'"); 
    eval("bbx0"+n+".style.display='block'"); 
}
function csecBoard(n) 
{ 
    for(i=1;i<45;i++) 
    { 
        eval("document.getElementById('cl0"+i+"').className='c102'"); 
        eval("cbx0"+i+".style.display='none'"); 
    } 
    eval("document.getElementById('cl0"+n+"').className='c101'"); 
    eval("cbx0"+n+".style.display='block'"); 
} 
function esecBoard(n) 
{ 
    for(i=1;i<2;i++) 
    { 
        eval("document.getElementById('el0"+i+"').className='e102'"); 
        eval("ebx0"+i+".style.display='none'"); 
    } 
    eval("document.getElementById('el0"+n+"').className='e101'"); 
    eval("ebx0"+n+".style.display='block'"); 
} 
function fsecBoard(n) 
{ 
    for(i=1;i<3;i++) 
    { 
        eval("document.getElementById('fl0"+i+"').className='f102'"); //f102ΚΗΡΥΙ«
        eval("fbx0"+i+".style.display='none'"); 
    } 
    eval("document.getElementById('fl0"+n+"').className='f101'"); //f101ΚΗΝΌΖ¬
    eval("fbx0"+n+".style.display='block'"); 
} 

function js_close_div(divname){
  //document.getElementById(divname).style.visibility = "hidden";
  document.getElementById(divname).style.display = "none";
}