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)

function getElementbyClass( classname )
{
	ccollect = new Array();
	var inc = 0;
	var alltags = document.all? document.all : document.getElementsByTagName( "*" );
	for ( i = 0; i < alltags.length; i++ )
	{
		if ( alltags[ i ].className == classname )
			ccollect[ inc++ ] = alltags[ i ];
	}
}

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

function expandcontent( cid )
{
	if ( typeof ccollect != "undefined" )
	{
		if ( collapseprevious == "yes" )
			contractcontent( cid );

		document.getElementById( cid ).style.display = ( document.getElementById( cid ).style.display != "block" )? "block" : "none";
	}
}

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 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;
	var 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";
	getElementbyClass( "switchcontent" );
	
	if ( enablepersist == "on" && typeof ccollect != "undefined" )
	{
		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 ( 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;