//animate the opening of the branch (span.grower jQueryElement)

function openBranch(jQueryElement, noAnimation) {

		jQueryElement.addClass('OPEN').removeClass('CLOSE');

		if(noAnimation)

			jQueryElement.parent().find('ul:first').show();

		else

			jQueryElement.parent().find('ul:first').slideDown();

}

//animate the closing of the branch (span.grower jQueryElement)

function closeBranch(jQueryElement, noAnimation) {

	jQueryElement.addClass('CLOSE').removeClass('OPEN');

	if(noAnimation)

		jQueryElement.parent().find('ul:first').hide();

	else

		jQueryElement.parent().find('ul:first').slideUp();

}



//animate the closing or opening of the branch (ul jQueryElement)

function toggleBranch(jQueryElement, noAnimation) {

	if(jQueryElement.hasClass('OPEN'))

		closeBranch(jQueryElement, noAnimation);

	else

		openBranch(jQueryElement, noAnimation);

}



//when the page is loaded...

$(document).ready(function () {

	//to do not execute this script as much as it's called...

	if(!$('ul.tree.dhtml').hasClass('dynamized'))

	{

		//add growers to each ul.tree elements

		$('ul.tree.dhtml ul').prev().before("<span class='grower OPEN'> </span>");

		

		//dynamically add the '.last' class on each last item of a branch

		$('ul.tree.dhtml ul li:last-child, ul.tree.dhtml li:last-child').addClass('last');

		

		//collapse every expanded branch

		$('ul.tree.dhtml span.grower.OPEN').addClass('CLOSE').removeClass('OPEN').parent().find('ul:first').hide();

		$('ul.tree.dhtml').show();

		

		//open the tree for the selected branch

			$('ul.tree.dhtml .selected').parents().each( function() {

				if ($(this).is('ul'))

					toggleBranch($(this).prev().prev(), true);

			});

			toggleBranch( $('ul.tree.dhtml .selected').prev(), true);

		

		//add a fonction on clicks on growers

		$('ul.tree.dhtml span.grower').click(function(){

			toggleBranch($(this));

		});

		//mark this 'ul.tree' elements as already 'dynamized'

		$('ul.tree.dhtml').addClass('dynamized');



		$('ul.tree.dhtml').removeClass('dhtml');

	}

});