$(function() {
  
  $(".ilink:not([src$=_on.png])").bind("mouseover mouseout", function(event) {
    var attr = $(this).attr("src");
    if( event.type == "mouseover") {
      $(this).attr("src", attr.replace(".png", "_on.png"));
    } else {
      $(this).attr("src", attr.replace("_on.png", ".png"));
    }
  });
  
  //track outgouing links
  $("a[target=_blank]").click(function() {
    var href = $(this).attr("href");
    pageTracker._trackPageview('/is250/outgoing/' + href);
    return true;
  });
 
});