function addText(text)
  {
  document.getElementById('textovepole').value = document.getElementById('textovepole').value + " " +text;
  }

function insertAtCursor(textarea, myValue)
  {
  var myField=document.getElementById(textarea);
  //IE support 
  if (document.selection)
    { 
      myField.focus();
      sel = document.selection.createRange(); 
      sel.text = myValue; 
    }

  //Mozilla/Firefox/Netscape 7+ support 
  else if (myField.selectionStart || myField.selectionStart == '0')
    {  
      var startPos = myField.selectionStart;
      var endPos = myField.selectionEnd; 
      myField.value = myField.value.substring(0, startPos)+ myValue 
      + myField.value.substring(endPos, myField.value.length);
    }
  else
    { 
      myField.value += myValue; 
    } 
  }