function reaction(obsah)
{
document.getElementById("obsah").value = obsah;
}
function show(j,co){
		var j,co	

			for(i=0;i<7;i++)
					{
					document.getElementById(co+i).style.display="none";
          	document.getElementById("most"+co+i).setAttribute("class", "unselected");
					}
			
					document.getElementById(co+j).style.display="block";

					document.getElementById("most"+co+j).setAttribute("class", "selected");
					
					}
					
function show_board(id)
  {
    var obj = document.getElementById('b'+id);
    if(obj.style.display == 'none')
      obj.style.display = 'block';
    else
      obj.style.display = 'none';
      
    var obj2 = document.getElementById('plus'+id);
    if(obj2.innerHTML == '+')
      obj2.innerHTML = '-';
    else
      obj2.innerHTML = '+';
  }