// Methode zur browserspezifischen Erzeugung eines XmlHttpRequest-Objekts
function getXmlHttpRequestObject() {
  if (window.XMLHttpRequest) {
    return new XMLHttpRequest();
  } else if(window.ActiveXObject) {
    return new ActiveXObject("Microsoft.XMLHTTP");
  } else {
    alert("Diese Seite ist nicht für ihren Browser optimiert. Bitte verwenden Sie einen neueren.");
  }
}

// globales XMLHttpRequest-Objekt erzeugen
var searchReq = getXmlHttpRequestObject();

// Wir bei onkeyup im Suchfeld aufgerufen. Startet den AJAX-Request
function searchSuggest() {
  if (searchReq.readyState == 4 || searchReq.readyState == 0) {
    var str = escape(document.getElementById('tag').value);
    searchReq.open("GET", 'scripts/tag_suggest.php?search=' + str, true);
    searchReq.onreadystatechange = handleSearchSuggest;
    searchReq.send(null);
  }
}

// Handler für Rückgabe der Suchvorschläge
function handleSearchSuggest() {
  if (searchReq.readyState == 4) {
    var ss = document.getElementById('search_suggest');
    ss.innerHTML = '';
	ss.style.display = 'block';
    var str = searchReq.responseText.split("\n");
    for(i=0; i < str.length - 1; i++) {
      // Element-String zusammenbauen
      var suggest = '<div onmouseover="javascript:suggestOver(this);" ';
      suggest += 'onmouseout="javascript:suggestOut(this);" ';
      suggest += 'class="suggest_link"><a href="onair-vod-tag-' + str[i] + '.html">' + str[i] + '</a></div>';
      ss.innerHTML += suggest;
    }
    if(i == 0){
	  ss.style.display = 'none';
    }
  }
}

// Mouse-Over-Funktion Suchvorschlag
function suggestOver(div_value) {
  div_value.className = 'suggest_link_over';
}
// Mouse-Out-Funktion Suchvorschlag
function suggestOut(div_value) {
  div_value.className = 'suggest_link';
}

function setSearch(value) {
  document.getElementById('tag').value = value;
  document.getElementById('search_suggest').innerHTML = '';
  document.getElementById('search_suggest').style.display = 'none';
}