// JavaScript Document
var STEP = 2;
var HEIGHT = 100;
var WNDO = null;

$(function(){
	WNDO = new dw_scrollObj('wn', 'lyr1');
	//dw_scrollObj.GeckoTableBugFix('wn'); 
	//dw_scrollObj.GeckoTableBugFix('wn'); 
	
	// détermination du HEIGHT des photos
	HEIGHT = $("#photos_hold IMG").get(0).height+4;
	
	// affichage de la nouvelle photo
	$("#photo_princ").load(function(){ 
		$(this).fadeIn("fast"); 
	});
	
	// selection de la premiere photo
	show_photo($("#photos_hold IMG").get(0), 0);
});



function scroll_up() {
	dw_scrollObj.scrollBy('wn',0,STEP*HEIGHT); 
	return false;
}

function scroll_down() {
	dw_scrollObj.scrollBy('wn',0,-HEIGHT*STEP); 
	return false;
}


function show_photo(item, index) {
	if(item.className == "active")
		return;
	if( $("#photo_princ").attr("src") && $("#photo_princ").attr("src").indexOf(item.src) > -1 )
		return;
	
	if(!jQuery.browser.safari)
		$("#photo_princ").hide();
	
	$("#photo_princ").attr("src", item.src.replace('&w=125&h=94&iar=1', '&w=400&h=300&iar=1'));
	
	$("#photos_hold IMG").attr("class", "");
	$(item).attr("class", "active");
	
	$("#photo_princ").show();
}