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如果你看我的日期驗證當我來測試它是否在過去它工作,雖然日期構造函數期望一個零日期月,所以我如何從子字符串值中減去一個代表月份(從結果之一,而不是位置)如何調整substr中的日期構造函數javascript
//start of datefield
var dateformat=/^(?:(?:31\/(?:0[13578]|1[02])|(?:29|30)\/(?:0[13-9]|1[012])|(?:0[1-9]|1\d|2[0-8])\/(?:0[1-9]|1[0-2]))\/[2-9]\d{3}|29\/02\/(?:[2-9]\d(?:0[48]|[2468][048]|[13579][26])|(?:[2468][048]|[3579][26])00))$/;
if (!date.match(dateformat))
{
errors.push("format incorrect use dd/mm/yyyy make sure you are entering correct days to the month remember 30 days have september, april, june & november, only 28 days in february unless leap year next is 2016");
}
var today = new Date();
var courseYear =date.substr(6,4) // use substr or substring to capture the last four digits
var courseMonth =date.substr(3,2) // use substr or substring to capture the four and fifth digits
var courseDay = date.substr(0,2)//e the first and second digits
var dateToCompare = new Date(courseYear, courseMonth, courseDay);
if (dateToCompare < today) {
errors.push("this date is in the past");
}
你問如何將字符串轉換爲數字? – SLaks
你是否認真地嘗試檢測正則表達式中的閏年? – Bergi
沒有對不起,基本上我的var coursemonth構造函數期望0基於月,所以jan是0 feb是1等等,所以當我做檢查,看看日期是否在過去,我輸入說25/05/2013這通過由於腳本認爲5實際上是6月。所以我想知道如何從substr值中扣除一個代表 – adam