function SwitchContent(className
                     , filterTag) {
    this.className = className;
    this.collapsePrev = false;
    this.persistType = "none";

    this.filter_content_tag = (typeof filterTag != "undefined")
                            ? filterTag.toLowerCase()
                            : "";
}

SwitchContent.prototype.setStatus = function(openHTML
                                             , closeHTML) {
    this.statusOpen = openHTML;
    this.statusClosed = closeHTML;
}

SwitchContent.prototype.setColor = function(openColor
                                             , closeColor) {
    this.colorOpen = openColor;
    this.colorClosed = closeColor;
}

SwitchContent.prototype.setPersist = function(bool
                                             , days) {
    if (bool == true) {
        if (typeof days == "undefined") {
            this.persistType = "session";
        }
        else {
            this.persistType = "days";
            this.persistDays = parseInt(days);
        }
    }
    else {
        this.persistType = "none";
    }
}

SwitchContent.prototype.collapsePrevious = function(bool) {
    this.collapsePrev = bool;
}


SwitchContent.prototype.sweepToggle = function(setting) {
    if (typeof this.headers != "undefined" &&
                                              this.headers.length > 0) {
        for (var i = 0; i < this.headers.length; i++) {
            if (setting == "expand") {
                this.expandcontent(this.headers[i]);
            }
            else if (setting == "contract") {
                this.contractcontent(this.headers[i]);
            }
        }
    }
}

SwitchContent.prototype.defaultExpanded = function() {
    var expandedindices = [];

    for (var i = 0; (!this.collapsePrev && i < arguments.length) || (this.collapsePrev && i == 0); i++) {
        expandedindices[expandedindices.length] = arguments[i];
    }

    this.expandedindices = expandedindices.join(",");
}

SwitchContent.prototype.togglecolor = function(header
                                             , status) {
    if (typeof this.colorOpen != "undefined") {
        header.style.color = status;
    }
}

SwitchContent.prototype.togglestatus = function(header
                                                 , status) {
    if (typeof this.statusOpen != "undefined") {
        header.firstChild.innerHTML = status;
    }
}

SwitchContent.prototype.contractcontent = function(header) {
    var innercontent = document.getElementById(header.id.replace("-title"
                                                                                                                      , ""));
    innercontent.style.display = "none";

    this.togglestatus(header
                                                              , this.statusClosed);
    this.togglecolor(header
                                                             , this.colorClosed);
}

SwitchContent.prototype.expandcontent = function(header) {
    var innercontent = document.getElementById(header.id.replace("-title"
                                                                                                                      , ""));
    innercontent.style.display = "block";

    this.togglestatus(header
                                                              , this.statusOpen);
    this.togglecolor(header
                                                             , this.colorOpen);
}

SwitchContent.prototype.toggledisplay = function(header) {
    var innercontent = document.getElementById(header.id.replace("-title"
                                                                                                         , ""));
    if (innercontent.style.display == "block") {
        this.contractcontent(header);
    }
    else {
        this.expandcontent(header);

        if (this.collapsePrev &&
                                                      typeof this.prevHeader != "undefined" &&
                                                      this.prevHeader.id != header.id) {
            this.contractcontent(this.prevHeader);
        }
    }

    if (this.collapsePrev) {
        this.prevHeader = header;
    }
}

SwitchContent.prototype.collectElementbyClass = function(classname) {
    var classnameRE = new RegExp("(^|\\s+)" +
                                                                                         classname +
                                                                                         "($|\\s+)", "i");

    this.headers = [];
    this.innercontents = [];

    if (this.filter_content_tag != "") {
        var allelements = document.getElementsByTagName(this.filter_content_tag);
    }
    else {
        var allelements = (document.all)
                                                                          ? document.all
                                                                          : document.getElementsByTagName("*");
    }

    for (var i = 0; i < allelements.length; i++) {
        if (typeof allelements[i].className == "string" &&
                                                              allelements[i].className.search(classnameRE) != -1) {
            if (document.getElementById(allelements[i].id + "-title") != null) {
                this.headers[this.headers.length] = document.getElementById(allelements[i].id + "-title");
                this.innercontents[this.innercontents.length] = allelements[i];
            }
        }
    }
}

SwitchContent.prototype.init = function() {
    var instanceOf = this;

    this.collectElementbyClass(this.className);

    if (this.headers.length == 0) {
        return;
    }

    if (this.persistType == "days" &&
                                          (parseInt(SwitchContent.getCookie(this.className + "_dtrack")) != this.persistDays)) {
        SwitchContent.setCookie(this.className + "_d"
                                                                , ""
                                                                , -1);
    }

    var opencontents_ids = (this.persistType == "session" &&
                                                              SwitchContent.getCookie(this.className) != "")
                                                           ? ',' + SwitchContent.getCookie(this.className) + ','
                                                           : (this.persistType == "days" &&
                                                              SwitchContent.getCookie(this.className + "_d") != "")
                                                           ? ',' + SwitchContent.getCookie(this.className + "_d") + ','
                                                           : (this.expandedindices)
                                                           ? ',' + this.expandedindices + ','
                                                           : "";

    for (var i = 0; i < this.headers.length; i++) {
        if (typeof this.statusOpen != "undefined") {
            this.headers[i].innerHTML = '<span class="status"></span>' + this.headers[i].innerHTML;
        }

        if (opencontents_ids.indexOf(',' + i + ',') != -1) {
            this.expandcontent(this.headers[i]);

            if (this.collapsePrev) {
                this.prevHeader = this.headers[i];
            }
        }
        else {
            this.contractcontent(this.headers[i]);
        }

        this.headers[i].onclick = function() {
            instanceOf.toggledisplay(this);
        }
    }

    SwitchContent.dotask(window
                                                         , function() {
                                                             instanceOf.rememberpluscleanup();
                                                         }
                                                         , "unload");
}

SwitchContent.prototype.rememberpluscleanup = function() {
    var opencontents = new Array("none");

    for (var i = 0; i < this.innercontents.length; i++) {
        if (this.persistType != "none" &&
                                                          this.innercontents[i].style.display == "block" &&
                                                          (!this.collapsePrev || (this.collapsePrev &&
                                                                                                    opencontents.length < 2))) {
            opencontents[opencontents.length] = i;
        }

        this.headers[i].onclick = null;
    }

    if (opencontents.length > 1) {
        opencontents.shift();
    }

    if (typeof this.statusOpen != "undefined") {
        this.statusOpen = this.statusClosed = null;
    }

    if (this.persistType == "session") {
        SwitchContent.setCookie(this.className
                                                                            , opencontents.join(","));
    }
    else if (this.persistType == "days" &&
                                                           typeof this.persistDays == "number") {
        SwitchContent.setCookie(this.className + "_d"
                                                                            , opencontents.join(",")
                                                                            , this.persistDays);
        SwitchContent.setCookie(this.className + "_dtrack"
                                                                            , this.persistDays
                                                                            , this.persistDays);
    }
}

SwitchContent.dotask = function(target
                                 , functionref
                                 , tasktype) {
    var tasktype = (window.addEventListener)
                                            ? tasktype
                                            : "on" + tasktype;

    if (target.addEventListener) {
        target.addEventListener(tasktype
                                                        , functionref
                                                        , false);
    }
    else if (target.attachEvent) {
        target.attachEvent(tasktype
                                                   , functionref);
    }
}

SwitchContent.getCookie = function(Name) {
    var re = new RegExp(Name + "=[^;]+"
                                                , "i");

    if (document.cookie.match(re)) {
        return document.cookie.match(re)[0].split("=")[1];
    }

    return "";
}

SwitchContent.setCookie = function(name
                                 , value
                                 , days) {
    if (typeof days != "undefined") {
        var expireDate = new Date();
        var expstring = expireDate.setDate(expireDate.getDate() + days);
        document.cookie = name + "=" + value + "; expires=" + expireDate.toGMTString();
    }
    else {
        document.cookie = name + "=" + value;
    }
}