var depth   = 10; //in pixels
var opacity = 15; //in procents

function updateElements(){
  var c = document.getElementById('Content');
  var a = document.all ? document.all : document.getElementsByTagName('*');
  for (var i = 0; i < a.length; i++){
    if (a[i].className == "shadow"){
      for (x = 0; x < depth; x++){
        var newSd = document.createElement("DIV");
        newSd.className = "shadow2";
        if (a[i].id == "")
          newSd.style.background = "black";
        else
          newSd.style.background = a[i].id;
        //opacity filter
        var opac = Math.round(((((depth - x) * 100) / depth) / 100) * opacity);
        newSd.style.opacity = (opac / 100);
        newSd.style.MozOpacity = (opac / 100);
        newSd.style.KhtmlOpacity = (opac / 100);
        newSd.style.filter = "alpha(opacity=" + opac + ")";
        //object position
        newSd.style.width = a[i].offsetWidth + "px";
        newSd.style.height = a[i].offsetHeight + "px";
        newSd.style.left = a[i].offsetLeft + x + 1 + "px";
        newSd.style.top = a[i].offsetTop + x + "px";
        c.appendChild(newSd);
      }
    }
    else if (a[i].className == "opac") changeOpac(a[i], a[i].id);
    else if (a[i].className == "image_text") changeOpac(a[i], '75');
  }
}

function changeOpac(elem, opac){
  elem.style.opacity = (opac / 100);
  elem.style.MozOpacity = (opac / 100);
  elem.style.KhtmlOpacity = (opac / 100);
  elem.style.filter = "alpha(opacity=" + opac + ")";
}

var cursubmenu = -1;

function submenu_switch(menu_id){
  if (cursubmenu >= 0){
    document.getElementById('sub_' + cursubmenu).className = 'submenu_gt_off';
    document.getElementById('sub_' + cursubmenu + '_link').className = 'submenu_link_off';
    document.getElementById('sub_' + cursubmenu + '_div').style.display = "none";
  }
  if (cursubmenu != menu_id){
    document.getElementById('sub_' + menu_id).className = 'submenu_gt_on';
    document.getElementById('sub_' + menu_id + '_link').className = 'submenu_link_on';
    document.getElementById('sub_' + menu_id + '_div').style.display = "block";
    cursubmenu = menu_id;
  }
  else{ cursubmenu = -1; }
}

function switchEngine(value){
  var obj = document.getElementById('maxengine');
  document.getElementById('maxengine').style.visibility = value;
}

function openWindow(page, wWidth, wHeight, type){
  var wLeft = (screen.width - wWidth) / 2;
  var wTop  = (screen.height - wHeight) / 2;
  if (wLeft < 0){ wWidth = screen.width; wLeft = 0; }
  if (wTop < 0) { wHeight = screen.height; wTop = 0; }
  if (type) page_location = page;
  else      page_location = "http://www.rijsserberg.nl/?q=win&x=" + page + "&ln=de";
  var openWin = window.open(page_location, "window", "width=" + wWidth + ",height=" + wHeight + ",top=" + wTop + ",left=" + wLeft + ",dependent=yes,scrollbars=yes");
  openWin.focus();
}

function checkSize(){
  var contentWidth  = document.getElementById('Content').clientWidth;
  var contentHeight = document.getElementById('Content').clientHeight;
  if (windowSize('width') < contentWidth){
    document.getElementById('Content').style.left = '0px';
    document.getElementById('Content').style.marginLeft = '0px';
  }
  else{
    document.getElementById('Content').style.left = '50%';
    document.getElementById('Content').style.marginLeft = '-' + parseInt(contentWidth / 2) + 'px';
  }
  if (windowSize('height') < contentHeight){
    document.getElementById('Content').style.top = '0px';
    document.getElementById('Content').style.marginTop = '0px';
  }
  else{
    document.getElementById('Content').style.top = '50%';
    document.getElementById('Content').style.marginTop = '-' + parseInt(contentHeight / 2) + 'px';
  }
}

function windowSize(what){
  var myWidth = 0, myHeight = 0;
  if (typeof(window.innerWidth) == 'number'){ //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  }
  else if (document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight)){ //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  }
  else if (document.body && (document.body.clientWidth || document.body.clientHeight)){ //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  if      (what == 'width')  return myWidth;
  else if (what == 'height') return myHeight;
}

var site_id = '1';
function maxengineSubmit(theform){
  if ((theform.coupon_code.value.length > 0) && (site_id == '0'))
    theform.type.value = 'list';
  else
    theform.type.value = 'hotel';
  theform.submit();
  switchEngine('visible');
}