Jquery彈出框以及跟随頁面滾動

<a href="http://blog.163.com/serena_lxj/blog/static/12382348020112714951735/">http://blog.163.com/serena_lxj/blog/static/12382348020112714951735/</a>

&lt;SCRIPT&gt;

$(function() {

  $( "#dialog" ).dialog({ width:625,position:'bottom',zIndex:9999});

});

  $(window).scroll(function(){

  $('.ui-dialog').css('top', $(document).scrollTop() + $(window).height() - $('.ui-dialog').height());});

&lt;/SCRIPT&gt;

&lt;style&gt;

.ui-draggable .ui-dialog-titlebar {width:96%;float:left;clear:both;}

.ui-state-hover .ui-icon, .ui-state-focus .ui-icon,.ui-widget-header .ui-icon,.ui-icon { background-image:url(/2011cnnauto/images/close.gif);}

.ui-icon{ width:50px; height:26px;}

.ui-dialog .ui-dialog-titlebar-close{ width:50px; height:25px;margin: -15px 0 0;}

.ui-icon-closethick { background-position:10px 50%;}

&lt;/style&gt;

&lt;div class="demo"&gt;

&lt;div id="dialog" title='007特别版 奔馳威霆VITO和奔馳雅諾VIANO'&gt;

&lt;p&gt;

&lt;img src='007.jpg' border="0"/&gt;

&lt;/a&gt;

&lt;/p&gt;

&lt;/div&gt;

頁面效果圖：