function suggest(fieldname, divname, items) {

  var keyword_raw = document.getElementById(fieldname).value;

  var keyword = keyword_raw.toLowerCase();

  var resultCount = 0;

  if(keyword != "") {

    var x;

    var suggestions = "";

    var usernames = items.split(",");

    for(x in usernames) {

      var username = usernames[x].toLowerCase();

      if(username.indexOf(keyword) != -1) {

	var matchString = new RegExp("("+keyword+")", "i");

        var username_label = usernames[x].replace(matchString, "<b>$1</b>");

        suggestions = suggestions + "<div class='suggest_item'><a class='suggest' href=\"javascript:insertTo('" + fieldname + "', '" + divname + "', '" + usernames[x] + "')\">" + username_label + "</a></div>";

	resultCount++;

      }

    }

  }

  if(resultCount > 0) {

    document.getElementById(divname).innerHTML = suggestions;

    document.getElementById(divname).style.display = "block";

  } else {

    document.getElementById(divname).innerHTML = "";

    document.getElementById(divname).style.display = "none";

  }

}

function insertTo(fieldname, divname, stringToInsert) {

    document.getElementById(fieldname).value = stringToInsert;

    document.getElementById(divname).style.display = "none";

}