/***********************************************
* Switch Content script- © Dynamic Drive (www.dynamicdrive.com)
* This notice must stay intact for legal use. Last updated April 2nd, 2005.
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

var enablepersist="on"; //Enable saving state of content structure using session cookies? (on/off)
var collapseprevious="no"; //Collapse previously open content when opening present? (yes/no)

var contractsymbol='- '; //HTML for contract symbol. For image, use: <img src="whatever.gif">
var expandsymbol='+ '; //HTML for expand symbol.


if (document.getElementById){
    document.write('<style type="text/css">');
    document.write('.switchcontent{display:none;}');
    document.write('</style>');
}

function getElementbyClass(rootobj, classname){
    var temparray=new Array();
    var inc=0;
    var rootlength=rootobj.length;
    for (i=0; i<rootlength; i++){
        if (rootobj[i].className==classname)
            temparray[inc++]=rootobj[i];
    }
    return temparray;
}

function sweeptoggle(ec){
    var thestate=(ec=="expand")? "block" : "none";
    var inc=0;
    while (ccollect[inc]){
        ccollect[inc].style.display=thestate;
        inc++;
    }
    revivestatus();
}


function contractcontent(omit){
    var inc=0;
    while (ccollect[inc]){
        if (ccollect[inc].id!=omit)
            ccollect[inc].style.display="none";
        inc++;
    }
}

function expandcontent(curobj, cid){
    var spantags=curobj.getElementsByTagName("SPAN");
    var showstateobj=getElementbyClass(spantags, "showstate");
    if (ccollect.length>0){
        if (collapseprevious=="yes")
            contractcontent(cid);
        document.getElementById(cid).style.display=(document.getElementById(cid).style.display!="block")? "block" : "none";
        if (showstateobj.length>0){ //if "showstate" span exists in header
            if (collapseprevious=="no")
                showstateobj[0].innerHTML=(document.getElementById(cid).style.display=="block")? contractsymbol : expandsymbol;
            else
                revivestatus();
        }
    }
}

function revivecontent(){
    contractcontent("omitnothing");
    selectedItem=getselectedItem();
    selectedComponents=selectedItem.split("|");
    for (i=0; i<selectedComponents.length-1; i++)
        document.getElementById(selectedComponents[i]).style.display="block";
}

function revivestatus(){
    var inc=0;
    while (statecollect[inc]){
        if (ccollect[inc].style.display=="block")
            statecollect[inc].innerHTML=contractsymbol;
        else
            statecollect[inc].innerHTML=expandsymbol;
        inc++;
    }
}

function get_cookie(Name) { 
    var search = Name + "=";
    var returnvalue = "";
    if (document.cookie.length > 0) {
        offset = document.cookie.indexOf(search);
        if (offset != -1) { 
            offset += search.length;
            end = document.cookie.indexOf(";", offset);
            if (end == -1) 
                end = document.cookie.length;
            returnvalue=unescape(document.cookie.substring(offset, end));
        }
    }
    return returnvalue;
}

function getselectedItem(){
    if (get_cookie(window.location.pathname) != ""){
        selectedItem=get_cookie(window.location.pathname);
        return selectedItem;
    }
    else
        return "";
}

function saveswitchstate(){
    var inc=0, selectedItem="";
    while (ccollect[inc]){
        if (ccollect[inc].style.display=="block");
            selectedItem+=ccollect[inc].id+"|";
        inc++;
    }

    document.cookie=window.location.pathname+"="+selectedItem;
}

function do_onload(){
    uniqueidn=window.location.pathname+"firsttimeload";
    var alltags=document.all? document.all : document.getElementsByTagName("*");
    ccollect=getElementbyClass(alltags, "switchcontent");
    statecollect=getElementbyClass(alltags, "showstate");
    if (enablepersist=="on" && ccollect.length>0){
        document.cookie=(get_cookie(uniqueidn)=="")? uniqueidn+"=1" : uniqueidn+"=0";
        firsttimeload=(get_cookie(uniqueidn)==1)? 1 : 0; //check if this is 1st page load
        if (!firsttimeload)
            revivecontent();
    }
    if (ccollect.length>0 && statecollect.length>0)
        revivestatus();
}

if (window.addEventListener)
    window.addEventListener("load", do_onload, false);
else if (window.attachEvent)
    window.attachEvent("onload", do_onload);
else if (document.getElementById)
    window.onload=do_onload;

if (enablepersist=="on" && document.getElementById)
    window.onunload=saveswitchstate;