var scrollTimerID = 0;

$(function() {

	// add click event for show/hide link
	$('#showhide').click(function() {
		$('body')[0].id = ('nohelp' == $('body')[0].id) ? 'help' : 'nohelp';
		$.cookie('help', $('body')[0].id, {path: '/'});
		this.blur();
		return false;
	});

	// add event handler to get ribbon content
	$('#menu a').click(function() {
		var title = $(this).html();
		title = title.replace(/(<([^>]+)>)/ig, '');
		selectMenuItem(title);
		this.blur();
		return false;
	});

	// setup any help links in links section
	$('a.help').click(function() {
		$('#sidebar').loadHelp(this.href);
		$('body')[0].id = 'help';
		$.cookie('help', 'help', {path: '/'});
		return false;
	});	

	$('#ribbon a.next').hover(function() {
		ribbonScroll(40);
	}, function() {
		if (scrollTimerID) {
			clearTimeout(scrollTimerID);
		}
	});

	$('#ribbon a.prev').hover(function() {
		ribbonScroll(-40);
	}, function() {
		if (scrollTimerID) {
			clearTimeout(scrollTimerID);
		}
	});

	selectMenuItem();

	// load help index page
	//loadHtml();
});

function selectMenuItem(title)
{
	var scroll = 0;

	// get title from cookies if not set
	if ('undefined' == typeof title) {
		title = $.cookie('menuSection');
		scroll = $.cookie('scroll');
		if (null == title) title = 'null';
	}

	// display ribbon contents
	showRibbon(title, scroll);
	
	// update selected menu item
	$('#menu a').each(function() {
		if (title == $(this).html().replace(/(<([^>]+)>)/ig, '')) {
			$(this).addClass('current');
		} else {
			$(this).removeClass('current');
		}
	});

	// add current menu selection to cookie
	$.cookie('menuSection', title, {path: '/'});
}

function showRibbon(id, scroll)
{
	id = id.replace(/[^a-zA-Z0-9]/g, '_');
	$('#ribbonContent table').each(function() {
		if ($(this)[0].id) {
			$(this).addClass('hidden');
		}
	});
	$('#ribbon_' + id).removeClass('hidden');
	if ($('#ribbonContent').length) {
		$('#ribbonContent')[0].scrollLeft = scroll;
	}
	checkScroll();
}

function checkScroll()
{
	if (!$('#ribbonContent').length) return;

	if (0 < $('#ribbonContent')[0].scrollLeft) {
		$('#ribbon .prev').removeClass('hidden');
	} else {
		$('#ribbon .prev').addClass('hidden');
	}

	if ($('#ribbonContent')[0].scrollLeft + $('#ribbonContent')[0].clientWidth < $('#ribbonContent')[0].scrollWidth) {
		$('#ribbon .next').removeClass('hidden');
	} else {
		$('#ribbon .next').addClass('hidden');
	}
}

function ribbonScroll(distance)
{
	if (0 < distance && $('#ribbonContent')[0].scrollWidth < $('#ribbonContent')[0].scrollLeft + distance) {
		$('#ribbonContent')[0].scrollLeft = $('#ribbonContent')[0].scrollWidth;
		checkScroll();
		clearTimeout(scrollTimerID);
	} else if (distance < 0 && $('#ribbonContent')[0].scrollLeft + distance < 0) {
		$('#ribbonContent')[0].scrollLeft = 0;
		checkScroll();
		clearTimeout(scrollTimerID);
	} else {
		$('#ribbonContent')[0].scrollLeft = $('#ribbonContent')[0].scrollLeft + distance;
		checkScroll();
		distance = distance * 1.2;
		scrollTimerID = setTimeout('ribbonScroll('+distance+')', 10);
	}
	$.cookie('scroll', $('#ribbonContent')[0].scrollLeft, {path: '/'});
}

function loadHtml(file) {
	if ('undefined' == typeof file) {
		file = $.cookie('helpFile');
		if (null == file) {
			file = urlHelpRoot;
		}
	}

	// check http vs https - otherwise the help bails with an error thinking we
	// are trying to use cross site scripting.
	if (file.substring(0, 5) != urlHelpRoot.substring(0, 5)) {
		file = (file.substring(0, 5) == 'https')
			? file.substring(0, 4) + file.substring(5)
			: file.substring(0, 4) + 's' + file.substring(4);
	}

	$.cookie('helpFile', file, {path: '/'});
	$('#sidebar').load(file, {}, function() {
		$('#sidebar').find('a.help').click(function() {
			loadHtml($(this)[0].href);
			return false;
		});	
	});
}




//-----------------------------------------------------------------------------
// table lists
//-----------------------------------------------------------------------------