jQuery picture special effects plug-in Revealing realizes stretching and magnification_jquery

$(document).ready(function(){
     
$('.photo_slider').each(function(){
   
  var $this = $(this).addClass('photo-area');
  var $img = $this.find('img');
  var $info = $this.find('.info_area');
     
  var opts = {};
   
  $img.load(function(){
    opts.imgw = $img.width();
    opts.imgh = $img.height();
  });
   
  opts.orgw = $this.width();
  opts.orgh = $this.height();
   
  $img.css ({
    marginLeft: "-150px",
    marginTop: "-150px"
  });
   
  var $wrap = $('<div class="photo_slider_img">').append($img).prependTo($this);
 
  var $open = $('<a href="#" class="more_info">More Info ></a>').appendTo($this);
   
  var $close = $('<a class="close">Close</a>').appendTo($info);
   
  opts.wrapw = $wrap.width();
  opts.wraph = $wrap.height();
   
  $open.click(function(){
    $this.animate({ 
      width: opts.imgw,
      height: (opts.imgh+30),
      borderWidth: "10"
    }, 600 );
         
    $open.fadeOut();
     
    $wrap.animate({ 
      width: opts.imgw,
      height: opts.imgh
    }, 600 );
 
    $(".info_area",$this).fadeIn();
     
    $img.animate({
      marginTop: "0px",
      marginLeft: "0px"
    }, 600 );
     
    return false;
  });
   
  $close.click(function(){
    $this.animate({ 
      width: opts.orgw,
      height: opts.orgh,
      borderWidth: "1"
     }, 600 );
     
    $open.fadeIn();
     
    $wrap.animate({ 
      width: opts.wrapw,
      height: opts.wraph
       }, 600 );
     
      $img.animate({
        marginTop: "-150px",
        marginLeft: "-150px"
      }, 600 );
 
    $(".info_area",$this).fadeOut();
    return false;
  });
   
});
 
});