// Menu accessible dynamique et CSS alternatives, V 1.0
//
// Copyright (c) 2004 Jacques PYRAT
// http://www.pyrat.net/
//
// Licensed under the LGPL license
// http://www.gnu.org/copyleft/lesser.html
//
// **********************************************************************
// This program 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. 
// **********************************************************************
//
// Presets
var jp_blankpic='squelettes/images/1.gif';
var jp_onclass='menu_plus';
var jp_offclass='menu_minus';
var jp_picalt='Cliquer pour ';
var jp_strDeplier='d\351plier: ';
var jp_strReplier='replier: ';
var jp_parentID='menu';
// Checking for DOM compatibility	
if (document.getElementById && document.createTextNode && document.createElement){jp_canDOM=true}

function jp_expinit(){
	if (jp_canDOM){
		if(jp_parentID && document.getElementById(jp_parentID)){
			jp_alluls=document.getElementById(jp_parentID).getElementsByTagName('UL');
			jp_alllis=document.getElementById(jp_parentID).getElementsByTagName('LI');
		}else{
			jp_alluls=document.getElementsByTagName('UL');
			jp_alllis=document.getElementsByTagName('LI');
		}
		for(i=0;i<jp_alluls.length;i++){
			jp_subul=jp_alluls[i];
			if(jp_subul.parentNode.tagName=='LI'){
				jp_supli=jp_subul.parentNode
				jp_islink=jp_supli.getElementsByTagName('a')[0];
				if(jp_islink){
					jp_addimg = document.createElement('img');
					jp_addimg.src=jp_blankpic;
					jp_addimg.className='node';
					jp_addimg.alt='';
					jp_addimg.onclick=function() {jp_ex(this,null);return false;};
					jp_supli.getElementsByTagName('A')[0].onkeypress=inputKeyHandler;
					jp_supli.getElementsByTagName('A')[0].onfocus=function() {jp_ex(this,0);};
					jp_supli.insertBefore(jp_addimg,jp_supli.firstChild);
				}
				// Do not collapse when there is a strong element in the list.
				jp_highlight=jp_subul.parentNode.getElementsByTagName('strong').length==0?true:false;
				jp_disp=jp_highlight?'none':'block';
				var jp_picaltonoff=jp_highlight?jp_picalt+jp_strDeplier:jp_picalt+jp_strReplier;
				jp_pic_class=jp_highlight?jp_onclass:jp_offclass;
				// End  highlight change
				jp_childs=jp_subul.getElementsByTagName('li').length
				jp_momimg=jp_subul.parentNode.getElementsByTagName('img')[0]
				if(jp_momimg){
					jp_momimg.setAttribute('title',jp_picaltonoff+jp_subul.parentNode.getElementsByTagName('a')[0].text);
					jp_momimg.setAttribute('alt',jp_picaltonoff+jp_subul.parentNode.getElementsByTagName('a')[0].text);
					jp_momimg.className=jp_pic_class;
					jp_subul.style.display=jp_disp;
				}
			}
		}
	}
}

// Collapse and Expand node.
function jp_ex(jp_n,jp_event){
	if(jp_canDOM){
		jp_u=jp_n.parentNode.getElementsByTagName("ul")[0];
		if (!jp_u) jp_u=jp_n.parentNode.parentNode.getElementsByTagName("ul")[0];;
		if(jp_u){
			if (((jp_u.style.display=='none'||jp_u.style.display=='')&&(jp_event==0||jp_event==43||jp_event==null))||((jp_u.style.display=='block')&&(jp_event==45||jp_event==null))) {
				jp_u.style.display=jp_u.style.display=='none'||jp_u.style.display==''?'block':'none';
				jp_img=jp_u.parentNode.getElementsByTagName('img')[0];
				jp_img.className=jp_img.className.indexOf(jp_offclass)!=-1?jp_onclass:jp_offclass;
				var jp_strAlt=jp_img.getAttribute('title');
				if (jp_img.className.indexOf(jp_offclass)!=-1) {
					var jp_re = new RegExp (jp_strDeplier, 'gi');
					var jp_strAltNew = jp_strAlt.replace(jp_re,jp_strReplier);
				}else{
					var jp_re = new RegExp (jp_strReplier, 'gi');
					var jp_strAltNew = jp_strAlt.replace(jp_re,jp_strDeplier);
				}
				jp_img.setAttribute('title',jp_strAltNew);
				jp_img.setAttribute('alt',jp_strAltNew);
				adjustLayout();
				return true;
			} else {
				return false;
			}
		}
	}			
}
function inputKeyHandler(ev) {
	ev = ev || event;
	if (jp_ex(ev.target || ev.srcElement,ev.keyCode || ev.which)) {
		ev.cancelBubble= true;
		if (ev.stopPropagation) ev.stopPropagation();
	}
}
	
function makeCookie(Name,Value,Expiry,Path,Domain,Secure){
  if (Expiry != null) {
    var datenow = new Date();
    datenow.setTime(datenow.getTime() + Math.round(86400000*Expiry));
    Expiry = datenow.toGMTString();
  }

  Expiry = (Expiry != null) ? '; expires='+Expiry : '';
  Path = (Path != null)?'; path='+Path:'';
  Domain = (Domain != null) ? '; domain='+Domain : '';
  Secure = (Secure != null) ? '; secure' : '';

  document.cookie = Name + '=' + escape(Value) + Expiry + Path + Domain + Secure;
}

function readCookie(Name) {
  var cookies = document.cookie;
  if (cookies.indexOf(Name + '=') == -1) return null;
  var start = cookies.indexOf(Name + '=') + (Name.length + 1);
  var finish = cookies.substring(start,cookies.length);
  finish = (finish.indexOf(';') == -1) ? cookies.length : start + finish.indexOf(';');
  return unescape(cookies.substring(start,finish));
}

function setActiveStyleSheet(pTitle) {
  var vLoop, vLink, vFound;
  vFound = false;
  for(vLoop=0; (vLink = document.getElementsByTagName("link")[vLoop]); vLoop++) {
  	if(vLink.getAttribute("rel").indexOf("style") != -1 && vLink.getAttribute("title")) {
      if(vLink.getAttribute("title") == pTitle) vFound = true;
	}
  }
  if (vFound) {
	for(vLoop=0; (vLink = document.getElementsByTagName("link")[vLoop]); vLoop++) {
	  if(vLink.getAttribute("rel").indexOf("style") != -1 && vLink.getAttribute("title")) {
		if(vLink.getAttribute("title") == pTitle) vLink.disabled = false
		  else vLink.disabled = true;
	  }
	}
  }
}

function selectStyle (vCookieName, vSelection) {
  //WRITE COOKIE
  makeCookie(vCookieName, vSelection, 90, '/');
  //ACTIVE SELECTED ALTERNAT STYLE SHEET
  setActiveStyleSheet(vSelection);
  adjustLayout();
  return void(0); //Pour pouvoir mettre un lien du type : <a href="javascript:selectStyle('style','fichierstyle');">Nom du style</a>
}

if (document.cookie.indexOf('style=')!=-1) {
  css = readCookie('style');
  //ACTIVATE SELECTED STYLE SHEET
  setActiveStyleSheet(css);
}

function adjustLayout() {
  // Get natural heights
  if (document.getElementById('content')) {
  	document.getElementById('content').style.height="auto";
  	var cHeight = Number(document.getElementById('content').offsetHeight);
	var cTop = Number(document.getElementById('content').offsetTop);
  }
  if (document.getElementById('navigation')) {
  	document.getElementById('navigation').style.height="auto";
  	var lHeight = Number(document.getElementById('navigation').offsetHeight);
	var lTop = Number(document.getElementById('navigation').offsetTop);
  }
  if (document.getElementById('extra')) {
  	document.getElementById('extra').style.height="auto";
  	var rHeight = Number(document.getElementById('extra').offsetHeight);
	var rTop = Number(document.getElementById('extra').offsetTop);
  }
  // Find the maximum height
  if (lTop!=rTop) {
    var maxHeight = Math.max(cHeight, Number(lHeight)+Number(rHeight));
  } else {
    var maxHeight = Math.max(cHeight, Math.max(lHeight, rHeight));
  }

  // Assign maximum height to all columns
  if (document.getElementById('content')) {
  	document.getElementById('content').style.height=maxHeight+'px';
  }
  if (Math.abs(lTop-rTop)>50) {
	  if (document.getElementById('extra')) {
		document.getElementById('extra').style.height = maxHeight - lHeight+'px';
	  }
  } else {
	  if (document.getElementById('navigation')) {
		document.getElementById('navigation').style.height=maxHeight+'px';
	  }
	  if (document.getElementById('extra')) {
		document.getElementById('extra').style.height=maxHeight+'px';
	  }
  }
}