window.onload=function(){
    setTimeout(ip.updateLayout, 0);
    setInterval(ip.updateLayout, 100);
    setTimeout(ip.hideURLbar,100);
  };

  ip={
    pageWidth:null,
    updateLayout:function(){
      var width=window.innerWidth;
      if (width != ip.pageWidth) {
        ip.pageWidth = width;
        var orientation = width == 320 ? "profile" : "landscape";
        // fire transition events
        orientation == 'profile' ? ip.transitionToProfile() : ip.transitionToLandscape();
        $(document.body).attr('class', orientation);
        setTimeout(function(){
            window.scrollTo(0, 1);
        }, 100);
      }
    },
    transitionToProfile: function(){
    },
    transitionToLandscape: function(){
    },  
    hideURLbar:function(){
      window.scrollTo(0, 1);
    }
  };   
// JavaScript Document