/*
Author   : bieler batiste
Company  : doSimple : http://www.dosimple.ch
send me a mail for more informations : faden@PASDEPOURRIELaltern.org - remove ( PASDEPOURRIEL )

Short javascript function to create and handle a CSS navigation menu

Copyright (C) 2004  Bieler Batiste

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

// the timeout for the menu
var timeout = 1000;

// not very clean but simple
// the function can be run in the HTML for faster display
// window.onload=initMenu;

// creat timeout variables for list item
// it's for avoid some warning with IE
for( var i = 0; i < 100; i++ ) {
	eval("var timeoutli" + i + " = false;");
}

// this fonction apply the CSS style and the event
function initMenu() {
	// a test to avoid some browser like IE4, Opera 6, and IE Mac
	if ( browser.isDOM1
	&& !( browser.isMac && browser.isIE )
	&& !( browser.isOpera && browser.versionMajor < 7 )
	&& !( browser.isIE && browser.versionMajor < 5 ) ) {

		// get some element
		var lis = $('menu').getChildren('li'); // all the li

		// change the class name of the menu,
		// it's usefull for compatibility with old browser
		$('menu').addClass('menu');

		// i am searching for ul element in li element
		for(var i = 0; i < lis.length; i++) {

			// is there a ul element ?
			if (lis[i].getChildren('ul').length > 0 ) {

				// improve IE key navigation
				if (browser.isIE) lis[i].addEvent('keyup',show);

				// link events to list item
				lis[i].addEvent('mouseover',show);
				lis[i].addEvent('mouseout',timeoutHide);
				lis[i].addEvent('blur',timeoutHide);
				lis[i].addEvent('focus',show);

				// add an id to list item
				lis[i].setProperty('id', "li"+i);

				var lis2 = $('li'+i).getFirst('ul').getChildren('li');

				for(var j = 0; j < lis2.length; j++) {

					// is there a ul element ?
					if (lis2[j].getChildren('ul').length > 0 ) {
						if (browser.isIE) lis2[j].addEvent('keyup',show);

						// link events to list item
						lis2[j].addEvent('mouseover',show);
						lis2[j].addEvent('mouseout',timeoutHide);
						lis2[j].addEvent('blur',timeoutHide);
						lis2[j].addEvent('focus',show);

						// add an id to list item
						lis2[j].setProperty( 'id', "li"+i+j);
					}
				}
			}
		}
	}
}

// hide the first ul element of the current element
function timeoutHide() {
	// start the timeout
	eval("timeout" + this.id + " = window.setTimeout('hideUlUnder(\"" + this.id + "\")', " + timeout + " );");
}

// hide the ul elements under the element identified by id
function hideUlUnder(id) {
	$(id).getFirst('ul').setStyle('display','none');
}

// show the first ul element found under this element
function show() {
	var menu = $('menu').getSize();
	var ulShow = this.getFirst('ul');

	// show the sub menu
	ulShow.setStyle('display','block');

	var sizeBlock = ulShow.getSize();

	var sizeLine = ulShow.getFirst('li').getSize();

	var topBlock = sizeBlock.y - sizeLine.y ;

// 	if(browser.isIE && browser.versionMajor < 7 ) topBlock = sizeBlock.y - sizeLine.y;
// 	else topBlock = sizeBlock.y - sizeLine.y;

// 	alert(topBlock);

// 	if(browser.isIE && browser.versionMajor < 7 ) ulShow.setStyle('margin-top',topBlock+'px');
// 	else ulShow.setStyle('margin-top','-'+topBlock+'px');


// Deroule du menu vers le haut
// ulShow.setStyle('margin-top','-'+topBlock+'px');

	//alert(ul.getStyle('margin-top'));

	var currentNode = this;

	while(currentNode) {
		if(currentNode.nodeName == 'LI') currentNode.getFirst('a').addClass('linkOver');
		if(currentNode.nodeName == 'LI') currentNode.getFirst('div').addClass('linkOver');

		currentNode = currentNode.getParent();
	}
	// clear the timeout
	eval ("clearTimeout( timeout"+ this.id +");");

	hideAllOthersUls(this);
}

// hide all ul on the same level of  this list item
function hideAllOthersUls(currentLi) {
	var lis = currentLi.getParent();

	for(var i = 0; i < lis.childNodes.length; i++) {
		if (lis.childNodes[i].nodeName == 'LI' && lis.childNodes[i].id != currentLi.id) hideUlUnderLi(lis.childNodes[i]);
	}
}

// hide all the ul wich are in the li element
function hideUlUnderLi(li) {
	var as = li.getChildren('a');
	var as2 = li.getChildren('div');

	for (var i = 0; i < as.length; i++) {
		as[i].removeClass('linkOver');
		as2[i].removeClass('linkOver');
	}

	var uls = li.getChildren('ul');

	for (var j = 0; j < uls.length; j++ ) {
		uls[j].setStyle('display','none');
	}
}