可以製作各種圖示，讓人覺得 ajax 有在執行

http://www.ajaxload.info/

http://www.napyfab.com/ajax-indicators/

http://www.refwell.com/blog/index.php/2007/01/25/full-dulpex-ajax-module-for-lighttpd/

http://www.miniajax.com/

A showroom of nice looking simple downloadable DHTML and AJAX scripts

淡入淡出特效

http://163.18.22.25/BFade/

http://www.maxkiesler.com/index.php/weblog/comments/round_up_of_50_ajax_toolkits_and_frameworks/

http://ajaxpatterns.org/PHP_Ajax_Frameworks_CHT

http://blog.xuite.net/emisjerry/tech/11384659

<div id="divLoading"
    style="border:3px blue solid;background-color:#ba2a4a;color:white;position:absolute;top:-50px;left:350px;width:250px;height:50px;z-order=0">
  <img src="http://b.blog.xuite.net/b/3/a/c/11893557/blog_10351/txt/11293067/7.gif"
       style="vertical-align:middle;padding:6px"/>
  網頁載入中，請稍候...
</div>

最後在任何一個自由欄位裡設定window.onload事件，在此事件裡把顯示出來的區域(divLoading)的顯示樣式變成 “none”，則「載入中」的框框就消失了。

<script>
  function init( ) {
    // .... 其他指令
    _oTag = document.getElementById("divLoading");
    _oTag.style.display = "none";  // hide it.
  }

  if (window.attachEvent) {
    window.attachEvent('onload', init);
  } else {
    window.addEventListener('load', init, false);
  }
</script>

http://www.dhtmlgoodies.com/index.html?whichScript=ajax_dynamicArticles

Demo: http://www.dhtmlgoodies.com/scripts/ajax-dynamic-articles/ajax-dynamic-articles.html

http://www.smashingmagazine.com/2007/06/20/

http://www.ajaxrain.com/