$(document).ready(function(){
    $('a[href^="http://"]') 
      .attr("target", "_blank");
    $('a[href*=.pdf]')
     .attr({"target":"_blank"});
     $("li:last-child").addClass('last');
     $("li:first-child").addClass('first');

$("#lastestWork img").hover(
 function()
 {
  this.src = this.src.replace("_off","_on");
 },
 function()
 {
  this.src = this.src.replace("_on","_off");
 }
);

});