function skryt(cell1,cell2,cell3) {
 var ele = document.getElementById(cell1);
 var text1 = document.getElementById(cell2);
 var text2 = document.getElementById(cell3);
 if(ele.style.display == "block") {
  ele.style.display = "none";
  text1.style.display = "block";
  text2.style.display = "none";
 } else {
  ele.style.display = "block";
  text1.style.display = "none";
  text2.style.display = "block";
 }
}