var timer;
var viewed;

function display(object, action) {
 switch(action) {
  case 0: timer = setTimeout("display(0, 2)", 250); break;
  case 1: {
   clearTimeout(timer);
   if(viewed) display(0, 2);
   document.getElementById(object).style.visibility = "visible";
   viewed = object;
  }
  break;
  case 2: {
   document.getElementById(viewed).style.visibility = "hidden";
   viewed = null;
  }
  break;
 }
}

function shfrch()
{
 document.getElementById("frch").style.display = "block";
 document.getElementById("chat").style.display = "none";
}

function chod() {
 if(document.getElementById("frch").name.value.length < 3 || document.getElementById("frch").text.text.length < 8) {
  alert("Přezdívka musí mít alespoň 3 znaky a text příspěvku alespoň 8 znaků!");
  return false;
 }
 else return true;
}