function skryvac(id){
	el=document.getElementById(id).style;
	el.display=(el.display == 'block')?'none':'block';
}

function show(obj,msg){
messageBox=document.getElementById("messageBox");
contents=document.getElementById("contents");

messageBox.style.top=obj.offsetTop
messageBox.style.left=obj.offsetLeft+obj.offsetWidth+5
contents.innerHTML=msg
messageBox.style.display="block"
}

function hl(id){
	el=id.style;
  data=document.getElementById("resvr");
  pocet=document.getElementById("pocdni");
  
	if (el.backgroundColor=="rgb(255, 204, 0)"){
    el.backgroundColor = "#009900";
    data.value=data.value.replace(";"+id.id,""); 
    pocet.value --; 
  }
  else {
    el.backgroundColor = "#FFCC00";
    data.value +=";"+id.id; 
    pocet.value ++;
  }
}
function m_change(dat){
  data=document.getElementById("resvr");
  
  window.location.href=dat+"&hsh="+data.value;
}
function obj_test()
	{
	  var f = self.document.forms.vzkaz;
	  if (f.jmen.value.length <= 0)
	  {
		alert("Chybí Vaše jméno!");
		return false;
	  }
    
	   
	  if (f.email.value.length <= 0)
	  {
		alert("Chybí Váš mail!");
		return false;
	  }
    
    if (f.email.value.indexOf("@") <= 0)
  	{
  		alert ("Chybný formát e-mailu!");
  		return false;
  	} 
    
    

	  if (f.text.value.length <= 0)
	  {
		alert("Chybí text zprávy!");
		return false;
	  }
	  
  	
  return true;
  }

function red(form) { 
  var index=form.spok.selectedIndex
  window.location.href="?page=kalendar&pokoj="+form.spok.options[index].value;
}