$(document).ready(function(){
   $(".auto-caption img").each(function(){
       var origAlign = this.align;
       if(origAlign == "left"){
           marginSide = "right";
       } else {
           marginSide = "left";
       }
       this.align = "";
       this.hspace= 0;
       this.vspace= 0;
       $(this).wrap("<div class=\"caption-wrapper\" style='background-color: #666; color: white; float: " + origAlign + " ;width: "+this.width+"px; margin-bottom: 10px;margin-" + marginSide + ": 10px'></div>");
       $(this).after("<p style='padding: 5px; margin:0; font-size: 0.9em'>" + this.alt + "</p>");
   });
});