<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title> New Document </title></head><body><div><span>請輸入一個形如yyyy-mm-DD的日期：</span> <input type="text" name="dateValue" id="dateValue" value="" /><button onclick="checkDate(document.getElementById('dateValue').value);">校正日期輸入是否合理</button></div><script language="javascript"><!--function checkDate(sValue){var regExp = /^(\d{4})-(\d{1,2})-(\d{1,2})$/;var result = sValue.match(regExp);if(!result){alert('輸入的日期格式不正確，正確的類型為[yyyy-mm-dd] ！');return false;}var year = parseInt(result[1], 10);var month = parseInt(result[2], 10);var day = parseInt(result[3], 10);if(month < 1 || month > 12){alert("月份應該為1到12的整數"); return false;}if (day < 1 || day > 31){alert("每個月的天數應該為1到31的整數"); return false;}if ((month==4 || month==6 || month==9 || month==11) && day==31){ alert("該月不存在31號"); return false;} if (month==2){ var isleap=(year % 4==0 && (year % 100 !=0 || year % 400==0)); if (day>29){ alert("2月最多有29天"); return false;} if ((day==29) && (!isleap)){ alert("閏年2月才有29天"); return false;} }}//--></script></body></html>
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