//-- for IE6 but not IE7, Moz, Safari, Opera...
try {
    if (typeof document.body.style.maxHeight == "undefined") {
        document.execCommand('BackgroundImageCache', false, true);
    }
} catch(e) { /* unless it's not IE6... */ }

var ua = navigator.userAgent.toLowerCase();
var isGecko     = (ua.indexOf("gecko") != -1) ;
var isIE        = (ua.indexOf("msie") != -1) && typeof(document.all) == 'object' && (ua.indexOf("opera") == -1);
var isOpera     = (ua.indexOf("opera") != -1) && !isIE;

var vbs_detect_pos = false;

var saved_pref = $.cookie('vbs_effects');
var useEffects = saved_pref == 'false' ? false : true;

// for now deaktivate effects for opera -> code a ajax workaround
if (isOpera)  useEffects = false;

/* switch prefs -> set global var and cookie and
   change link background  - simply not ? */
function setMyEffects() {
  var newValue  = useEffects ? false : true;
  var style = 'cbox_checked';

  if (isOpera && newValue) {
      alert('Derzeit koennen im Opera Browser die Effekte nicht verwendet werden !');
      newValue = false;
  }
  if (!newValue) {
     $.cookie('vbs_effects','false', {expires: 30});
     style = 'cbox_unchecked';
  } else {
     $.cookie('vbs_effects','',{expires: -1});
  }
  setPrefBackground(style);
  useEffects = newValue;
}

function setPrefBackground(style) {
  $('#pref_effects').css('background',' url(/vbs/img07/' + style + '.gif) 0 2px no-repeat');
}

var active_tt = null;
var block_tt = false;
var LOADED_CONTENT = [];
$(document).ready(function() {
  $('#pref').show();
  if (useEffects) setPrefBackground('cbox_checked');
  /*
  $('div.tip')
      .mouseover(function() { block_tt = true; })
      .mouseout(function() { block_tt = false; });
  */

  $('#programm').find('a').each(function() {
      // Tooltip
      if (this.className == 'tt') {
          $(this)
              .attr('id',this.name)
              .bind("mouseenter",function() {
                  if (active_tt != null) return;
                  // detect the correct div
                  var id='';
                  var txt = this.firstChild.data.trim();
                  switch (txt.charAt(0)) {
                    case 'R': id='tt_reigen';break;
                    case 'F': id='tt_fernwaerme';break;
                    case 'H': id='tt_hdm';break;
                  }
                  if (id=='') return;
                  active_tt = '#'+id;
                  $(active_tt).css( $(this).offset() ).show();
              })
              .bind("mouseleave",function() {
                  if (active_tt == null || block_tt) return;
                  window.setTimeout(function() {
                      if (active_tt == null || block_tt) return;
                      $(active_tt).hide();
                      active_tt = null;
                  },2000);
              });
      } else if (this.id != 'pref_effects') {
          $(this).click(function() {
              para = this.href.split('=');
              if ($.inArray(para[1], LOADED_CONTENT) == -1) {
                  // add new div and load html via ajax call
    			  $('#ajax_loader').css('position', 'absolute').css( $(this).offset() ).show();
                  $('<div class="ajax_content"></div>')
                      .insertAfter($(this).parent())
                      .load('detail_' + para[1] + '.html?v=0.1',null, function() {
                          $(this).show('slide', {direction:'up'})
                                 // add click handler for detail top link
                                 .find('a.ico_top').click(function() {
                                      $(this).parent().parent().hide('slide', {direction:'up'});
                                 });
                          LOADED_CONTENT.push(para[1]);
                          window.setTimeout(function() { $('#ajax_loader').hide();}, 300);
                      });
              } else {
                  // content is already loaded - toggle div
                  $(this).parent().next().each(function() {
                      if (this.style.display == 'block')
                         $(this).hide('slide', {direction:'up'});
                      else
                         $(this).show('slide', {direction:'up'});
                  });
              }
              return false;
          });
      }
  });

  /* add nice scrollTo Effects to the Calendar */
  $('#calender_navi').localScroll().find('a').click(function() {
      a = this.href.split('#');
      var theTarget = $("a[name='"+a[1]+"']").parent().show('highlight',{duration:3500});
      //return false;
  });

});

String.prototype.trim = function() {
    return this.replace(/(^\s+|\s+$)/g, '');
}