/*
 * Thickbox 2.0 - One Box To Rule Them All.
 * By Cody Lindley (http://www.codylindley.com)
 * Copyright (c) 2006 cody lindley
 * Licensed under the MIT License:
 *   http://www.opensource.org/licenses/mit-license.php
 * Thickbox is built on top of the very light weight jQuery library.
 */

//on page load call TB_init
$(document).ready(TB_init);

//add thickbox to href elements that have a class of .thickbox
function TB_init(){
        $("a.thickbox").click(function(){
        var t = this.title_x || this.name || null;
        var g = this.rel || false;
        TB_show(t,this.href,g);
        this.blur();
        return false;
        });
}

function TB_show(caption, url, imageGroup) {//function called when the user clicks on a thickbox link

        try {
                if (document.getElementById("TB_HideSelect") == null) {
                $("body").append("<iframe id='TB_HideSelect'></iframe><div id='TB_overlay'></div><div id='TB_window'></div>");
                $("#TB_overlay").click(TB_remove);
                }

                if(caption==null){caption=""};

                $(window).scroll(TB_position);

                TB_overlaySize();

                $("body").append("<div id='TB_load'><img src='http://chemie.marienschule.de/bild/loadingAnimation.gif' /></div>");
                TB_load_position();

                var urlString = /\.jpg|\.jpeg|\.png|\.gif|\.html|\.htm|\.php|\.cfm|\.asp|\.aspx|\.jsp|\.jst|\.rb|\.txt|\.bmp/g;
                var urlType = url.toLowerCase().match(urlString);

                if(urlType == '.jpg' || urlType == '.jpeg' || urlType == '.png' || urlType == '.gif' || urlType == '.bmp'){//code to show images

                        TB_PrevCaption = "";
                        TB_PrevURL = "";
                        TB_PrevHTML = "";
                        TB_NextCaption = "";
                        TB_NextURL = "";
                        TB_NextHTML = "";
                        TB_imageCount = "";
                        TB_FoundURL = false;
                        if(imageGroup){
                                TB_TempArray = $("a[@rel="+imageGroup+"]").get();
                                for (TB_Counter = 0; ((TB_Counter < TB_TempArray.length) && (TB_NextHTML == "")); TB_Counter++) {
                                        var urlTypeTemp = TB_TempArray[TB_Counter].href.toLowerCase().match(urlString);
                                                if (!(TB_TempArray[TB_Counter].href == url)) {
                                                        if (TB_FoundURL) {
                                                                TB_NextCaption = TB_TempArray[TB_Counter].title_x;
                                                                TB_NextURL = TB_TempArray[TB_Counter].href;
                                                                TB_NextHTML = "<span id='TB_next'>&nbsp;&nbsp;<a href='#'>Weiter &gt;</a></span>";
                                                        } else {
                                                                TB_PrevCaption = TB_TempArray[TB_Counter].title_x;
                                                                TB_PrevURL = TB_TempArray[TB_Counter].href;
                                                                TB_PrevHTML = "<span id='TB_prev'>&nbsp;&nbsp;<a href='#'>&lt; Zur&uuml;ck</a></span>";
                                                        }
                                                } else {
                                                        TB_FoundURL = true;
                                                        TB_imageCount = "Bild " + (TB_Counter + 1) +" von "+ (TB_TempArray.length);
                                                }
                                }
                        }

                        imgPreloader = new Image();
                        imgPreloader.onload = function(){

                        imgPreloader.onload = null;

                        // Resizing large images - orginal by Christian Montoya edited by me.
                        var pagesize = TB_getPageSize();
                        var x = pagesize[0] - 150;
                        var y = pagesize[1] - 150;
                        var imageWidth = imgPreloader.width;
                        var imageHeight = imgPreloader.height;
                        if (imageWidth > x) {
                                imageHeight = imageHeight * (x / imageWidth);
                                imageWidth = x;
                                if (imageHeight > y) {
                                        imageWidth = imageWidth * (y / imageHeight);
                                        imageHeight = y;
                                }
                        } else if (imageHeight > y) {
                                imageWidth = imageWidth * (y / imageHeight);
                                imageHeight = y;
                                if (imageWidth > x) {
                                        imageHeight = imageHeight * (x / imageWidth);
                                        imageWidth = x;
                                }
                        }
                        // End Resizing

                        TB_WIDTH = imageWidth + 30;
                        TB_HEIGHT = imageHeight + 60;
                        $("#TB_window").append("<a href='' id='TB_ImageOff' title_x='close'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"'/></a>" + "<div id='TB_caption'>"+caption+"<div id='TB_secondLine'>" + TB_imageCount + TB_PrevHTML + TB_NextHTML + "</div></div><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title_x='Fenster schlie&szlig;en'>Schlie&szlig;en</a></div>");

                        $("#TB_closeWindowButton").click(TB_remove);

                        if (!(TB_PrevHTML == "")) {
                                function goPrev(){
                                        if($(document).unclick(goPrev)){$(document).unclick(goPrev)};
                                        $("#TB_window").remove();
                                        $("body").append("<div id='TB_window'></div>");
                                        $(document).unkeyup();
                                        TB_show(TB_PrevCaption, TB_PrevURL, imageGroup);
                                        return false;
                                }

                                $("#TB_prev").click(goPrev);

                                $(document).keyup( function(e){ var key = e.keyCode; if(key == 37){goPrev()} });
                        }



                        if (!(TB_NextHTML == "")) {
                                function goNext(){
                                        $("#TB_window").remove();
                                        $("body").append("<div id='TB_window'></div>");
                                        $(document).unkeyup();
                                        TB_show(TB_NextCaption, TB_NextURL, imageGroup);
                                        return false;
                                }

                                $("#TB_next").click(goNext);

                                $(document).keyup( function(e){ var key = e.keyCode; if(key == 39){goNext()} });
                        }

                        TB_position();
                        $("#TB_load").remove();
                        $("#TB_ImageOff").click(TB_remove);
                        $("#TB_window").css({display:"block"}); //for safari using css instead of show
                        }

                        imgPreloader.src = url;
                }

                if(urlType=='.htm'||urlType=='.html'||urlType=='.php'||urlType=='.asp'||urlType=='.aspx'||urlType=='.jsp'||urlType=='.jst'||urlType=='.rb'||urlType=='.txt'||urlType=='.cfm' || (url.indexOf('TB_inline') != -1) || (url.indexOf('TB_iframe') != -1) ){//code to show html pages

                        var queryString = url.replace(/^[^\?]+\??/,'');
                        var params = TB_parseQuery( queryString );

                        TB_WIDTH = (params['width']*1) + 30;
                        TB_HEIGHT = (params['height']*1) + 40;
                        ajaxContentW = TB_WIDTH - 30;
                        ajaxContentH = TB_HEIGHT - 45;

                        if(url.indexOf('TB_iframe') != -1){
                                        urlNoQuery = url.substr(0,TB_strpos(url, "?"));
                                        $("#TB_window").append("<div id='TB_title_x'><div id='TB_ajaxWindowtitle_x'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>close</a></div></div><iframe src='"+urlNoQuery+"' id='TB_iframeContent' style='width:"+(ajaxContentW + 30)+"px;height:"+(ajaxContentH + 18)+"px;'></iframe>");
                                }else{
                                        $("#TB_window").append("<div id='TB_title_x'><div id='TB_ajaxWindowtitle_x'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>Schließen</a></div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;'></div>");
                        }

                        $("#TB_closeWindowButton").click(TB_remove);

                                if(url.indexOf('TB_inline') != -1){
                                        $("#TB_ajaxContent").html($('#' + params['inlineId']).html());
                                        TB_position();
                                        $("#TB_load").remove();
                                        $("#TB_window").css({display:"block"});
                                }else if(url.indexOf('TB_iframe') != -1){
                                        TB_position();
                                        $("#TB_load").remove();
                                        $("#TB_window").css({display:"block"});
                                }else{
                                        $("#TB_ajaxContent").load(url, function(){
                                                TB_position();
                                                $("#TB_load").remove();
                                                $("#TB_window").css({display:"block"});
                                        });
                                }

                }

                $(window).resize(TB_position);

        } catch(e) {
                alert( e );
        }
}

//helper functions below

function TB_remove() {
        $("#TB_window").fadeOut("fast",function(){$('#TB_window,#TB_overlay,#TB_HideSelect').remove();});
        $("#TB_load").remove();
        $(document).unkeyup();
        return false;
}

function TB_position() {
        var pagesize = TB_getPageSize();
        var arrayPageScroll = TB_getPageScrollTop();

        $("#TB_window").css({width:TB_WIDTH+"px",left: ((pagesize[0] - TB_WIDTH)/2)+"px", top: (arrayPageScroll[1] + ((pagesize[1]-TB_HEIGHT)/2))+"px" });
        TB_overlaySize();
}

function TB_overlaySize(){
        if (window.innerHeight && window.scrollMaxY) {
                yScroll = window.innerHeight + window.scrollMaxY;
        } else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
                yScroll = document.body.scrollHeight;
        } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
                yScroll = document.body.offsetHeight;
          }
        $("#TB_overlay").css("height",yScroll +"px");
        $("#TB_HideSelect").css("height",yScroll +"px");
}

function TB_load_position() {
        var pagesize = TB_getPageSize();
        var arrayPageScroll = TB_getPageScrollTop();

        $("#TB_load")
        .css({left: ((pagesize[0] - 100)/2)+"px", top: (arrayPageScroll[1] + ((pagesize[1]-100)/2))+"px" })
        .css({display:"block"});
}

function TB_parseQuery ( query ) {
   var Params = new Object ();
   if ( ! query ) return Params; // return empty object
   var Pairs = query.split(/[;&]/);
   for ( var i = 0; i < Pairs.length; i++ ) {
      var KeyVal = Pairs[i].split('=');
      if ( ! KeyVal || KeyVal.length != 2 ) continue;
      var key = unescape( KeyVal[0] );
      var val = unescape( KeyVal[1] );
      val = val.replace(/\+/g, ' ');
      Params[key] = val;
   }
   return Params;
}

function TB_getPageScrollTop(){
        var yScrolltop;
        if (self.pageYOffset) {
                yScrolltop = self.pageYOffset;
        } else if (document.documentElement && document.documentElement.scrollTop){         // Explorer 6 Strict
                yScrolltop = document.documentElement.scrollTop;
        } else if (document.body) {// all other Explorers
                yScrolltop = document.body.scrollTop;
        }
        arrayPageScroll = new Array('',yScrolltop)
        return arrayPageScroll;
}

function TB_getPageSize(){
        var de = document.documentElement;
        var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
        var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;

        arrayPageSize = new Array(w,h)
        return arrayPageSize;
}

function TB_strpos(str, ch) {
for (var i = 0; i < str.length; i++)
if (str.substring(i, i+1) == ch) return i;
return -1;
}