/* 
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

var lokalita;

function PouzitOblast(area) {
  if(lokalita == null && !getAreaControl())
    return false;

  if(area.charAt(2)=="-")
  {
    area = "okres " + area.substring(3, area.length);
  }

  areas = lokalita.value.split(', ');

  if(areas.length >= 50)
  {
    alert("Nelze zadat více než 50 lokalit !");
    return false;
  }

  for(var i=0; i<areas.length; i++)
  {
    if(areas[i] == area)
    {
      var str1 = "", str2 = "";
      if(i==0 && areas.length==1)
        str1 = area;
      else if(i==0)
        str1 = area + ", ";
      else if(i==areas.length - 1)
      {
        lokalita.value = lokalita.value.substring(0, lokalita.value.length - area.length - 2);
        return false;
      }
      else
      {
        str1 = ", " + area + ", ";
        str2 = ", ";
      }

      lokalita.value = lokalita.value.replace(str1, str2);
      return false;
    }
  }

  if(lokalita.value != "")
    lokalita.value += ", ";

  lokalita.value += area;

  return false;
}

function VymazatOblasti()
{
  if(lokalita)
    lokalita.value = "";
}

function getAreaControl()
{
  lokalita = document.getElementById("lokalita");
  return lokalita != null;
}