// JavaScript Document

/* -- Affichage aléatoire des epubs -- */

function setEpub() {
	var epubs	= new Array('1.swf');
	//var epubs	= new Array('1.swf', '2.swf');
	var rep 	= 	'swf/epub/';
	var i 		= 	Math.round(Math.random()*(epubs.length-1));
	return rep+epubs[i];
}


function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}

// gestion du menu

var current_sublist;
var menu;

function initMenu(){
	menu = document.getElementById("menu");
	var items = menu.getElementsByTagName("LI");
	
	for(var i=0; i<items.length; i++){		
		if(items[i].className != "on"){
			items[i].onmouseover = rolloverItem;
			items[i].onmouseout = rolloutItem;
			
			var submenu = items[i].getElementsByTagName("UL")[0];
			if(submenu) submenu.style.display = "none";
		}
	}		
}

function rolloverItem(){
	var img = this.getElementsByTagName("IMG")[0];
	if(img) img.src = img.src.split(".png").join("-over.png");
	
	var submenu = this.getElementsByTagName("UL")[0];	
	
	if(submenu){
		// si un autre sous-menu est ouvert on le ferme temporairement
		var sublists = menu.getElementsByTagName("UL");
		for(var i=0; i<sublists.length; i++){
			if(sublists[i].style.display!="none") current_sublist = sublists[i];
		}
		if(current_sublist) current_sublist.style.display = "none";
		submenu.style.display="block";
	}		
}

function rolloutItem(){
	var img = this.getElementsByTagName("IMG")[0];
	if(img) img.src = img.src.split("-over.png").join(".png");
	
	var submenu = this.getElementsByTagName("UL")[0];
	if(submenu){
		submenu.style.display="none";
	}
	
	// si le sous-menu courant existe on le réaffiche
	if(current_sublist) current_sublist.style.display = "block";
}