function initRollOverImages() {
  var image_cache = new Object();
  $(".Rollover img").each(function(i) {
    var imgsrc = this.src;
    var dot = String(imgsrc).lastIndexOf('.');
    
    // for iepngfix.htc
    if(imgsrc == location.protocol + "//" + location.host + "/images/common/blank.gif")
    {
    	var imgstyle = $(this).attr("style");
    	imgsrc = imgstyle.match(/http:\/\/+.+png/);
    	dot = String(imgsrc).lastIndexOf('.');
    }
    
    var imgsrc_on = String(imgsrc).substr(0, dot) + '_on' + String(imgsrc).substr(dot, 4);
    image_cache[this.src] = new Image();
    image_cache[this.src].src = imgsrc_on;
    $(this).hover(
      function() { this.src = imgsrc_on; },
      function() { this.src = imgsrc; });
  });
}

$(document).ready(initRollOverImages);