~~~ <script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script> <script type="text/javascript"> //网站运行时间 function show_date_time(){ window.setTimeout("show_date_time()", 1000); BirthDay=new Date("01/09/2013 00:00:00");//这个日期是可以修改的 today=new Date(); timeold=(today.getTime()-BirthDay.getTime()); sectimeold=timeold/1000 secondsold=Math.floor(sectimeold); msPerDay=24*60*60*1000 e_daysold=timeold/msPerDay daysold=Math.floor(e_daysold); e_hrsold=(e_daysold-daysold)*24; hrsold=Math.floor(e_hrsold); e_minsold=(e_hrsold-hrsold)*60; minsold=Math.floor((e_hrsold-hrsold)*60); seconds=Math.floor((e_minsold-minsold)*60); var siteDate = "已运行"+daysold+"天"+hrsold+"小时"+minsold+"分"+seconds+"秒"; $("#show_date_time").html(siteDate); } show_date_time() </script> <span id="show_date_time" ></span> ~~~ 效果图所示