/*
    Système d'affichage pour la Gallery
*/

var restarea=6      // Largeur de la position neutre du centre (en px)
var maxspeed=4      // Vitesse
var endofgallerymsg="";


var _onloads = new Array();
	 	   function bodyOnLoad() {
		for ( var i = 0 ; i < _onloads.length ; i++ )
	        {
		     _onloads[i]();
	        }
	   }
       window.onload = bodyOnLoad;
       
       
function enlargeimage(path, optWidth, optHeight) 
{
    var actualWidth=typeof optWidth!="undefined" ? optWidth : "600px"
    var actualHeight=typeof optHeight!="undefined" ? optHeight : "500px"
    var winattributes="width="+actualWidth+",height="+actualHeight+",resizable=yes"
    window.open(path,"", winattributes)
}

var iedom=document.all||document.getElementById
var scrollspeed=0
var movestate=""

var actualwidth=''
var cross_scroll, ns_scroll
var loadedyes=0

function ietruebody()
{
    return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function creatediv()
{
    statusdiv=document.createElement("div")
    statusdiv.setAttribute("id","statusdiv")
    document.body.appendChild(statusdiv)
    statusdiv=document.getElementById("statusdiv")
    statusdiv.innerHTML=endofgallerymsg
}

function positiondiv()
{
    menuheight=parseInt(crossmain.offsetHeight)
    mainobjoffsetH=getposOffset(crossmain, "top")
    statusdiv.style.left=mainobjoffset+(menuwidth/2)-(statusdiv.offsetWidth/2)+"px"
    statusdiv.style.top=menuheight+mainobjoffsetH+"px"
}

function showhidediv(what)
{
    if (endofgallerymsg!="")
        statusdiv.style.visibility=what
}

function getposOffset(what, offsettype)
{
    var totaloffset=(offsettype=="left")? what.offsetLeft: what.offsetTop;
    var parentEl=what.offsetParent;
    while (parentEl!=null) {
        totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
        parentEl=parentEl.offsetParent;
    }
    return totaloffset;
}

function moveleft()
{
    if (loadedyes){

		movestate="right"
        if (iedom&&parseInt(cross_scroll.style.left)<0){
        cross_scroll.style.left=parseInt(cross_scroll.style.left)+scrollspeed+"px"
        showhidediv("hidden")
			
        } else {
            showhidediv("visible")
        }
    }
    righttime=setTimeout("moveleft()",10)
}

function moveright()
{
    if (loadedyes) {
		
     	movestate="left"
        if (iedom&&parseInt(cross_scroll.style.left)>(menuwidth-actualwidth)){
        cross_scroll.style.left=parseInt(cross_scroll.style.left)-scrollspeed+"px"
        showhidediv("hidden")
	
        } else {
            showhidediv("visible")
        }
    }
    lefttime=setTimeout("moveright()",10)
}

function Galleryengine(e) 
{
    var dsocx=(window.pageXOffset)? pageXOffset: ietruebody().scrollLeft;
    var dsocy=(window.pageYOffset)? pageYOffset : ietruebody().scrollTop;
    var curposy=window.event? event.clientX : e.clientX? e.clientX: ""
    curposy-=mainobjoffset-dsocx
    var leftbound=(menuwidth-restarea)/2
    var rightbound=(menuwidth+restarea)/2
    if (curposy>rightbound) {
        scrollspeed=(curposy-rightbound)/((menuwidth-restarea)/2) * maxspeed
        if (window.righttime) clearTimeout(righttime)
        if (movestate!="left") moveright()
    }
    else if (curposy<leftbound) {
        scrollspeed=(leftbound-curposy)/((menuwidth-restarea)/2) * maxspeed
        if (window.lefttime) clearTimeout(lefttime)
        if (movestate!="right") moveleft()
    } else {
        scrollspeed=0
    }
}

function contains_ns6(a, b) 
{
    while (b.parentNode)
        if ((b = b.parentNode) == a)
            return true;
    return false;
}

function stopGallery(e) 
{
    if ((window.event&&!crossmain.contains(event.toElement)) || (e && e.currentTarget && e.currentTarget!= e.relatedTarget && !contains_ns6(e.currentTarget, e.relatedTarget))) {
        if (window.lefttime) clearTimeout(lefttime)
            if (window.righttime) clearTimeout(righttime)
                movestate=""
    }
}

function initGallery() 
{
    if (iedom) {
        crossmain=document.getElementById? document.getElementById("gallery_container") : document.all.gallery_container
        if (crossmain === null) {
            return;
        }
        menuwidth=parseInt(crossmain.style.width)
        mainobjoffset=getposOffset(crossmain, "left")
        cross_scroll=document.getElementById? document.getElementById("gallery") : document.all.gallery
        actualwidth=document.all? cross_scroll.offsetWidth : document.getElementById("trueContainer").offsetWidth

        crossmain.onmousemove=function(e){
            Galleryengine(e)
        }
        crossmain.onmouseout=function(e){
            stopGallery(e)
            showhidediv("hidden")
        }
    }
    loadedyes=1
    if (endofgallerymsg!=""){
        creatediv()
        positiondiv()
    }
}

_onloads.push(initGallery);