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<html> <head> <meta charset="UTF-8"> <title></title> </head> <body> <script type="text/javascript"> var time = setInterval(timer,1000); timer(); function timer(){ var that = new Date('2017/4/2 00:00:00'); var oDate = new Date(); var a = that.getTime(); var b = oDate.getTime(); var c = a - b ; if(c>=0){ var Tday = Math.floor(c/1000/60/60/24); var Thouer =Math.floor( c/1000/60/60%24); var Tmin =Math.floor(c/1000/60%60); var Tsec =Math.floor(c/1000%60); document.body.innerHTML = '距离清明短假'+ Tday + '天' + Thouer + '小时' + Tmin + '分' + Tsec + '秒'; } } </script> </body></html>