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<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>JS计算两个日期之间的天数</title>
</head>
<body>
<script type="text/javascript">
function btnCount_Click(){
s1 = "2006-12-18"
s2 = "2007-1-5"
alert("第一个日期；"+s1+"/n第二个日期："+s2+"/n相差"+DateDiff(s1,s2)+"天")
}
//计算天数差的函数，通用
function DateDiff(sDate1, sDate2){ //sDate1和sDate2是2006-12-18格式
var aDate, oDate1, oDate2, iDays;
aDate = sDate1.split("-");
oDate1 = new Date(aDate[1] + '-' + aDate[2] + '-' + aDate[0]); //转换为12-18-2006格式
aDate = sDate2.split("-");
oDate2 = new Date(aDate[1] + '-' + aDate[2] + '-' + aDate[0]);
iDays = parseInt(Math.abs(oDate1 - oDate2) / 1000 / 60 / 60 /24); //把相差的毫秒数转换为天数
return iDays;
}
</script>
<input name="" type="button" onclick="btnCount_Click()" value="计算天数" />
</body>
</html>