var el, el2, el3, el4, el5, w2, left2, h3, h4;
$(document).ready(function(){
  $("#visuel").addClass('opacity');
  el = $("#visuel > img"); el.css('opacity','0.1');
  el2 = $("#blockaccueil"); w2 = el2.width(); left2 = el2.css('left'); el2.width('0px').css('left','-5px');
  el3 = $("#masque2"); h3 = el3.height(); el3.height('0px');
  el4 = $("#masque1"); h4 = el4.height(); el4.height('0px');
  el5 = $("#btn_video"); el5.css('right','-900px'); //rajout Steph btn video
  setTimeout(function(){ if(!isStart) doAnimation(); },6000);
});
var isStart=false;
function doAnimation(){
  isStart=true;
  el = $("#visuel > img");
  el.css('opacity','0.1').each(function(){ $("#visuel").removeClass('opacity'); }).animate({opacity:1},1500,function(){
    el3.animate({height:h3},750);
    el5.animate({right:0},750); //rajout Steph btn video
    el4.animate({height:h4},750, function(){
      el2.animate({left:left2,width:w2},700);
    });
  });
}