// JavaScript Document
   function zobrazit(id){
	  document.getElementById("show_"+id).style.display = "block";
	  document.getElementById("showlink_"+id).style.display = "none";
   }
   function skryt(id){ 
	  document.getElementById("show_"+id).style.display = "none";
	  document.getElementById("showlink_"+id).style.display = "block";
	 }
   function showS(id){
    for(i=1; i<10; i++)
    hiddenS(i);
        
         document.getElementById("show_"+id).style.display = "block";
	  document.getElementById("hiddenlink_"+id).style.display = "block";
	  document.getElementById("showlink_"+id).style.display = "none"; 
  }
   function hiddenS(id){
         if(document.getElementById("show_"+id))
         { 
	  document.getElementById("show_"+id).style.display = "none";
	  document.getElementById("hiddenlink_"+id).style.display = "none";
	  document.getElementById("showlink_"+id).style.display = "block";
	  }
	 }	 
	 
	  var stred = 3; //aktuálně zobrazený
    function move(way, count) {
      if(stred != count-2 && way == "next") {
        var hidden = stred - 2;
        document.getElementById("block" + hidden).style.display = "none";
        var show = stred + 3;
        document.getElementById("block" + show).style.display = "block";
        stred++;
      }
      if(stred != 3 && way == "back") {
        var hidden = stred + 2;
        document.getElementById("block" + hidden).style.display = "none";
        var show = stred-3;
        document.getElementById("block" + show).style.display = "block";
        stred--;
      }
    }
    
    
    function checkForm(form) {

    for (var i = 0; i < form.elements.length; ++i)

        if (!form.elements[i].value && form.elements[i].type) {

            alert("Nevyplnili jste povinné pole!");

            form.elements[i].focus();

            return false;

        }

}