/*
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 menuBC

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 menuBC
var timeout = 1000;

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

// 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 initMenuBC(){
    // 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 menuv = document.getElementById('menuBC'); // the root element
		if (menuv != null){
			var lis = menuv.getElementsByTagName('li'); // all the li

			// change the class name of the menuBC,
			// it's usefull for compatibility with old browser
			menuv.className='menuBC';

			// i am searching for ul element in li element
			for ( var i=0; i<lis.length; i++ ){
				// is there a ul element ?
				if ( lis.item(i).getElementsByTagName('ul').length > 0 ){
					// improve IE key navigation
					if ( browser.isIE ){
						addAnEvent(lis.item(i),'keyup',show);
					}
					// link events to list item
					addAnEvent(lis.item(i),'mouseover',show);
					addAnEvent(lis.item(i),'mouseout',timeoutHide);
					addAnEvent(lis.item(i),'blur',timeoutHide);
					addAnEvent(lis.item(i),'focus',show);
					// add an id to list item
					lis.item(i).setAttribute( 'id', "li"+i );
					lis.item(i).getElementsByTagName('a')[0].className = 'menuBCIndicateur';
				}
			}
		}
    }
}

function addAnEvent( target, eventName, functionName ){
    // apply the method to IE
    if ( browser.isIE ){
        //attachEvent dont work properly with this
        eval('target.on'+eventName+'=functionName');
    }
    // apply the method to DOM compliant browsers
    else{
        target.addEventListener( eventName , functionName , true ); // true is important for Opera7
    }
}

// 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 ){
    document.getElementById(id).getElementsByTagName('ul')[0].style['visibility'] = 'hidden';
}

// show the first ul element found under this element
function show(){
    // show the sub menuBC
    this.getElementsByTagName('ul')[0].style['visibility'] = 'visible';
    // 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 ul = currentLi.parentNode;
    //alert(lis.childNodes.length);
    for ( var i=0; i<ul.childNodes.length; i++ ){
        if ( ul.childNodes[i].id && ul.childNodes[i].id != currentLi.id ){
            hideUlUnderLi( ul.childNodes[i] );
        }
    }
}

// hide all the ul wich are in the li element
function hideUlUnderLi( li ){
    var uls = li.getElementsByTagName('ul');
    for ( var i=0; i<uls.length; i++ ){
        uls.item(i).style['visibility'] = 'hidden';
    }
}