function align()
    {

    var lmt = document.getElementById('centrage');
    var container = document.documentElement;

    if(lmt && container)
    {
       var containerHeight;
        if (container.innerWidth)
        {
            containerHeight = container.innerHeight;
        }
    else
    {
            containerHeight = container.clientHeight;
        }
    var lmtHeight;
    if (lmt.innerWidth)
    {
        lmtHeight = lmt.innerHeight;
    }
     else
    {
        lmtHeight = lmt.offsetHeight;
    }
      var y = Math.ceil((containerHeight - lmtHeight) / 2);
     if(y < 0)
     {
     y = 0;
      }
      lmt.style.position = "relative";
      lmt.style.top = y + "px";
    }
    if (document.getElementById)
    {
        document.body.style.visibility = 'visible';
    }

}

function addevent(obj,evt,fn,capt){
    if(obj.addEventListener)
    {
        obj.addEventListener(evt, fn, capt);
        return true;
    }
    else if(obj.attachEvent)
    {
        obj.attachEvent('on'+evt, fn);
        return true;
    }
    else return false;
    }

    if (document.getElementById && document.getElementsByTagName)
    {
    	addevent(window, 'load', align, false);
    	addevent(window, 'resize', align, false);
    }