類似於PHP中的Checkdate。
//函數名：CheckDateTime//功能介紹：檢查是否為日期時間function CheckDateTime(str){var reg = /^(/d+)-(/d{1,2})-(/d{1,2}) (/d{1,2}):(/d{1,2}):(/d{1,2})$/;var r = str.match(reg);if(r==null)return false;r[2]=r[2]-1;var d= new Date(r[1], r[2],r[3], r[4],r[5], r[6]);if(d.getFullYear()!=r[1])return false;if(d.getMonth()!=r[2])return false;if(d.getDate()!=r[3])return false;if(d.getHours()!=r[4])return false;if(d.getMinutes()!=r[5])return false;if(d.getSeconds()!=r[6])return false;return true;}/**判斷輸入框中輸入的日期格式為yyyy-mm-dd和正確的日期*/function IsDate(sm,mystring) {var reg = /^(/d{4})-(/d{2})-(/d{2})$/;var str = mystring;var arr = reg.exec(str);if (str=="") return true;if (!reg.test(str)&&RegExp.$2<=12&&RegExp.$3<=31){alert("請保證"+sm+"中輸入的日期格式為yyyy-mm-dd或正確的日期!");return false;}return true;}function toDateFromString( strDate ){if (strDate.length != 8) {return null ;}var dtDate = null ;var nYear = parseInt( strDate.substring( 0, 4 ), 10 ) ;var nMonth = parseInt( strDate.substring( 4, 6 ), 10 ) ;var nDay = parseInt( strDate.substring( 6, 8 ), 10 ) ;if( isNaN( nYear ) == true || isNaN( nMonth ) == true || isNaN( nDay ) == true ){return null ;}dtDate = new Date( nYear, nMonth - 1, nDay ) ;if( nYear != dtDate.getFullYear() || ( nMonth - 1 ) != dtDate.getMonth() || nDay != dtDate.getDate() ){return null ;}return dtDate ;}YYYYMMDD的格式以上這篇JS判斷日期格式是否合法的簡單實例就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持武林網。