var youtubeShow;

$(document).ready(function(){

  /* colorbox */
  $("a[rel='lightbox']").colorbox();
  $("a[rel='youtube']").colorbox({iframe:true, innerWidth:640, innerHeight:505});

  /* funkce pro colorbox */
  youtubeShow = function() {
	  var youtubebox = $("a[rel='youtube']").colorbox();
	  youtubebox.colorbox({open:true});
  };
  
  /* external links */
  $("a[href^='http://maps']").click(function(){window.open(this.href); return false;});
  $("a.external").click(function(){window.open(this.href); return false;});
  
  /* image lazy load */
  /*
  $("img").lazyload({ effect : "fadeIn" });
  */
  
  /* datepicker */
  var def = $("#datepicker").val();
  $("#datepicker").datepicker();
  $("#datepicker").datepicker("option", "dateFormat", "dd.mm.yy" );
  $("#datepicker").val(def);
  $("#datepickerbutt").click(function(){
	  $("#datepicker").datepicker("show");
	  return false;
  });
  
  /* celkova cena */
  $('#pocet').keyup(function(){
	  var ks = $('#pocet').val();
	  if ( IsNumeric(ks) ) {
		  $('#total').val(480*ks);
	  } else {
		  $('#total').val('');
	  }
  });
    
});

/**
 * Testovani cisla 
 * @param input
 * @returns {Boolean}
 */
function IsNumeric(input) {
   return (input - 0) == input && input.length > 0;
}