// JavaScript Document
$(document).ready(function(){
  function rollover_img(selector, suffix){
    $(selector).each(function(i){
      var default_img = $(this).attr("src");
      if (!default_img.match((suffix))) { 
        var point = default_img.lastIndexOf(".") 
        var mouseover_img = default_img.slice(0, point) + suffix + default_img.slice(point); 
        var preload_img = new Image();
        preload_img.src = mouseover_img;  
        $(this).hover(
          function(){
            $(this).attr("src", mouseover_img);
          },
          function(){
            $(this).attr("src", default_img);
          }
        )
      }
    })
  }

  rollover_img(".over img", "_over");
  rollover_img(".over input", "_over");
});