jquery - How to enable javascript function in datatype call? -

i have code

function loadpage(url) {     url = url.replace('#page', '');      $.ajax({         type: "post",         url: "load_page.php",         data: 'page=' + url,         datatype: "html",         success: function (msg) {             if (parseint(msg) != 0) {                 $('#pagecontent').html(msg);                 $('#loading').css('visibility', 'hidden');             }         }     }); }  $(".pageclose").click(function () {     $(".backscreen").animate({ "left": "100%" });  }); 

and code open next page without loading. can not activate .pageclose.. <div class="pageclose"> close </div> exist on other pages. when put page, code pageclose can not function. why?

*note : im using code http://tutorialzine.com/2009/09/simple-ajax-website-jquery/