/**
 * remove hover class on menu items
 */
function unhoverMenu()
{
	// remove hover class on menu item
	var link = $('mainMenu').getElementsByTagName('a');
	for( var i=0; i<link.length; i++)
	{
		$(link[i].id).removeClassName('current');
	}
}


/**
 * hide all sub menu items
 */
function unhoverSubMenu()
{
	// hide sub menus
	var ul = $('subMenu').getElementsByTagName('ul');
	for( var i=0; i<ul.length; i++)
	{
		$(ul[i].id).removeClassName('current');
	}
}


/**
 * activate hover on menu and show its sub menu
 */
function hoverMenu(id)
{
	unhoverSubMenu();	
	
	// add hover class on menu item 
	$('mainMenu_' + id).addClassName('current');
	// show sub menu
	if( $('subMenu_' + id) )
	{
		$('subMenu_' + id).addClassName('current');
	}	
}

/**
 * Switch element visibility
 * @param a_elements - Array contains id of elements to roll
 * @param rolling_interval - Integer
 * 
 */
function switch_element (a_elements, rolling_interval) {
	var current 		= 0;
	var element_length	= a_elements.length - 1;
	var intervalId;
	
	/* init: show first element of a_elements */
	var init = function(){
		for(i = 0; i < element_length; i++){
			if(i == current){
				$(a_elements[i]).show();
			}
			else{
				$(a_elements[i]).hide();
			}
		}

		if(rolling_interval){
			start_automatic_roll();
		}
		
	};
	
	/* perform rolling element */
	var roll = function(){
		$(a_elements[current]).hide();
		
		if(current < element_length) {
			current++;
		}
		else{
			current = 0;
		}
		
		$(a_elements[current]).show();
		
		start_automatic_roll();
	};
	
	/* start & restart automatic roll */
	var start_automatic_roll = function(){
		clearInterval(intervalId);
		intervalId = setInterval(roll, rolling_interval);
	};
	init();
}


/**
 * update selectbox value and label
 * 
 * @param action 	(new or edit participant)
 * @param id		of the current new participant after new action or the updated participant after edit action
 * @param value		new name of a participant after edit action
 */
function updateSelectbox( action, id, name, id_select )
{
	//retrieve all selectbox
	collection = $$(".sellor_stageParticipantSelect");
	var id_select = id_select;
	//if you create a new participant, add him in each selectBox and make it selected if it's the selectbox refere to the clicked add button
	if( action == "new" )
	{
		collection.each( function(select, index)
		{
			if( select.id == id_select )
			{
				selected = true;
			}
			else
			{
				selected = false;
			}
			
			var new_option = new Option( name, id, false, selected );
			select.options[select.length] = new_option;
		});
	}
	//else if you edit a participant, update his name in each selectbox
	else if( action == "edit" )
	{
		for( var i=0; i < collection.length; i++ )
		{
			options = collection[i].getElementsByTagName('option');
			
			for( var j=0; j < options.length; j++ )
			{
				if( options[j].value == id )
				{
					options[j].text = name;
				}
			}
		}
	}
}


/**
 * refresh list of stage in function of selected site
 * 
 * @param	id_site
 * @return	list of stage
 */
function refreshStageList( value, selected_value )
{
	// purge schedule info
	$("stage_schedule").innerHTML = "";
	
	//get stage selectBox and purge it
	select = $("stage_selectBox");
	select.options.length = 0;
	
	//after purge, insert new stage list for selected site	
	var new_option = new Option( '', '', false );
	select.options[select.length] = new_option;

	if( stageIndexedBySite[value] && stageIndexedBySite[value].length > 0 )
	{
		newStageList = stageIndexedBySite[value];
		current_stage_name = '';
		for( j=0; j < newStageList.length; j++)
		{
			selected = false;
			if( newStageList[j]['id_stage'] == selected_value )
			{
				selected = true;
			}
			var new_option = new Option( newStageList[j]['name'], newStageList[j]['id_stage'], selected );
			select.options[select.length] = new_option;
			
			// Last and Current name was same
			// Add period to option name
			if( current_stage_name == newStageList[j]['name'] )
			{
				select.options[select.length - 2].text += ' ('+newStageList[j-1]['period']+')';
				select.options[select.length - 1].text += ' ('+newStageList[j]['period']+')';
			}
			current_stage_name = newStageList[j]['name'];
		}
	}
}