$(document).ready(function(){
  if($.browser.msie){
    if($.browser.version < 7){
    //  window.alert('old version');	
    	//window.alert($("img").length);
      $("img").each(function(i){
      //  var source = this.attr("src");
        $(this).attr("src", $(this).attr("src").replace(/.png/, ".gif"));
      });
      $("#pihb").css("background-image", "url(/img/structure/350x200.gif)");
      $(".flipDate").css("background-image", "url(/img/structure/flipcal.gif)");
    }
  }
 });