function showContext(text) {
  document.all('contextInfo').innerHTML = text;
  document.all('contextInfo').style.background = "red";
}

function hideContext() {
  document.all('contextInfo').innerHTML = ' ';
  document.all('contextInfo').style.background = "818181";
}



var running = false
var lock = false
var netscape = (navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 4);

function countit(t, info, maxlength) {
  str = t.value
  strlength = str.length
  if ((!netscape || !lock) && strlength > maxlength) {
    lock = true;
    alert("Text je příliš dlouhý! Maximum je 255 znaků.");
    t.value = str.substring(0,maxlength);
    charleft = 0;
    lock = false;
  } else
    charleft = maxlength - strlength
    
  info.innerHTML = "Napsáno " + strlength + "/" + maxlength + " (" + charleft + " zbývá)";
}



function confirmSubmit() {
  var agree=confirm("Jste si jisti?");
  if (agree)
	return true ;
  else
	return false ;
}