类似于PHP中的Checkdate。
//函数名：CheckDateTime//功能介绍：检查是否为日期时间function CheckDateTime(str){var reg = /^(/d+)-(/d{1,2})-(/d{1,2}) (/d{1,2}):(/d{1,2}):(/d{1,2})$/;var r = str.match(reg);if(r==null)return false;r[2]=r[2]-1;var d= new Date(r[1], r[2],r[3], r[4],r[5], r[6]);if(d.getFullYear()!=r[1])return false;if(d.getMonth()!=r[2])return false;if(d.getDate()!=r[3])return false;if(d.getHours()!=r[4])return false;if(d.getMinutes()!=r[5])return false;if(d.getSeconds()!=r[6])return false;return true;}/**判断输入框中输入的日期格式为yyyy-mm-dd和正确的日期*/function IsDate(sm,mystring) {var reg = /^(/d{4})-(/d{2})-(/d{2})$/;var str = mystring;var arr = reg.exec(str);if (str=="") return true;if (!reg.test(str)&&RegExp.$2<=12&&RegExp.$3<=31){alert("请保证"+sm+"中输入的日期格式为yyyy-mm-dd或正确的日期!");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的格式以上这篇JS判断日期格式是否合法的简单实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持武林网。