function mark()
{
var ts = document.getElementById("specyfikacja");
var dif = document.getElementsByName('dif')
var ile =0;
var chosen=new Array();
// -[ CZYSCI OZNACZENIA ]-
for ( var i in ts.rows  ) 
{
if(i>2 && i<20)
{
  for ( var j in ts.rows[i].cells  )
  {
  if(j>0 && j<9)
    {
    if(i%2==1){
    
    	ts.rows[i].cells[j].setAttribute('class', 'x');
    	ts.rows[i].cells[j].className = "x";
    
    }else{
		ts.rows[i].cells[j].setAttribute('class', '#3d7ec8');    
    	ts.rows[i].cells[j].className = "grey";
    }
    }	
  }	
}
} 
// -[ SPRAWDZA ILE JEST ZAZNACZONYCH ]-
for(i=0;i<8 ;i++) {
	if(dif[i].checked == true){
	ile++; 
	chosen.push(i+1);
	}
}
// -[ JESLI DWA ZAZNACZONE TO POROWNUJE ]-
if (ile == 2)
{
	for ( var i in ts.rows  )
	{
	if(i>2 && i<21)
	{
		if(ts.rows[i].cells[chosen[0]].innerHTML != ts.rows[i].cells[chosen[1]].innerHTML)
		{
		ts.rows[i].cells[chosen[0]].setAttribute('class', 'highlight');
		ts.rows[i].cells[chosen[0]].className = "highlight";
		ts.rows[i].cells[chosen[1]].setAttribute('class', 'highlight');
		ts.rows[i].cells[chosen[1]].className = "highlight";
		}		
	}
	} 
} 
}

function selectBox( id )
{
var dif = document.getElementsByName('dif')
var ile =0;

for(i=0;i<8 ;i++) 
{
	if(dif[i].checked == true)
	ile++; 
}
if (ile > 2)
{
for(i=0;i<8 ;i++) {
	dif[i].checked=false;
}
dif[id].checked=true;
}
}