$(document).ready(function(){
  $(".mod_galleries").each(function(){

    if( $(this).find(".gallery_thumb_container li").length > 0 ) {

      var width = $(this).find("img:first").css("border-left-width").split("px")[0]
      
      if(! width > 0 ) return;
      
      var count = Math.ceil($(this).find("li").length / $(this).find("li.new_row").length)
      
      var old_width = $(this).find(".gallery_thumb_container").css("width").split("px")[0]
      var new_width = parseInt(width * 2 * count) + parseInt(old_width)
    
      $(this).find(".gallery_thumb_container").css("width", new_width + "px")
    }
  })
})