Question

有人可以帮助我将这些功能中的日期格式更改为YYYY / MM / DD，并且如果这些检查失败，还可以帮助我阻止默认表单提交吗？我的数据库是YYYY / MM / DD格式，我按日期查询，所以这很重要。谢谢你的帮助

function ValidateForm(ctrl){
 var stdate = document.getElementById("start");
 var endate = document.getElementById("end");

 //Validate the format of the start date
 if(isValidDate(stdate.value)==false){
  return false;
 }
 //Validate the format of the end date
 if(isValidDate(endate.value)==false){
  return false;
 }
 //Validate end date to find out if it is prior to start date
 if(checkEnteredDates(stdate.value,endate.value)==false){
  return false;
 }

 //Set the values of the hidden variables
 FROMDATE.value= stdate.value;
 TODATE.value= endate.value;

 return true;
}

//--------------------------------------------------------------------------
//This function verifies if the start date is prior to end date.
//--------------------------------------------------------------------------
function checkEnteredDates(stdateval,endateval){
 //seperate the year,month and day for the first date
 var stryear1 = stdateval.substring(6);
 var strmth1  = stdateval.substring(0,2);
 var strday1  = stdateval.substring(5,3);
 var date1    = new Date(stryear1 ,strmth1 ,strday1);

 //seperate the year,month and day for the second date
 var stryear2 = endateval.substring(6);
 var strmth2  = endateval.substring(0,2);
 var strday2  = endateval.substring(5,3);
 var date2    = new Date(stryear2 ,strmth2 ,strday2 );

 var datediffval = (date2 - date1 )/864e5;

 if(datediffval <= 0){
  alert("Start date must be prior to end date");
  return false;
 }
 return true;
}
//--------------------------------------------------------------------------
//This function validates the date for MM/DD/YYYY format. 
//--------------------------------------------------------------------------
function isValidDate(dateStr) {

 // Checks for the following valid date formats:
 // MM/DD/YYYY
 // Also separates date into month, day, and year variables
 var datePat = /^(\d{2,2})(\/)(\d{2,2})\2(\d{4}|\d{4})$/;

 var matchArray = dateStr.match(datePat); // is the format ok?
 if (matchArray == null) {
  alert("Date must be in MM/DD/YYYY format")
  return false;
 }

 month = matchArray[1]; // parse date into variables
 day = matchArray[3];
 year = matchArray[4];
 if (month < 1 || month > 12) { // check month range
  alert("Month must be between 1 and 12");
  return false;
 }
 if (day < 1 || day > 31) {
  alert("Day must be between 1 and 31");
  return false;
 }
 if ((month==4 || month==6 || month==9 || month==11) && day==31) {
  alert("Month "+month+" doesn't have 31 days!")
  return false;
 }
 if (month == 2) { // check for february 29th
  var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
  if (day>29 || (day==29 && !isleap)) {
   alert("February " + year + " doesn't have " + day + " days!");
   return false;
    }
 }
 return true;  // date is valid
}

Answer 1

mplungjan提供了一些日期验证程序的链接，这是我喜欢的那个（也许我有偏见......）：

How to validate a date?

根据您的格式修改它：

function isValidDate(s) {
  var bits = s.split(/\D+/);
  var d = new Date(bits[0], --bits[1], bits[2]);
  return d && (d.getMonth() + 1) == bits[1] && d.getDate() == Number(bits[2]) || NaN;
}

因此，您的表单可以执行以下操作：

<form onsubmit="return isValidDate(this.start.value) && isValidDate(this.end.value)" ...>

虽然您可能希望验证比这更复杂。

修改

所以我有一个开始日期和结束日期，我需要验证一些事项，1。）两个日期的格式为YYYY / MM / DD 2.）结束日期不在开始日期之前3.）他们已经在每个月输入正确的天数，占闰年的闰年，如果其中任何一个不正确，请不要提交表格

嗯，你应该能够从提供的内容中做到这一点。尝试：

function validateForm(form) {
  var start = form.start.value;
  var end   = form.end.value;
  var startDate = parseYMD(start);
  var endDate   = parseYMD(end);

  return startDate < endDate && isValidDate(start) && isValidDate(end);
}

使用助手：

function parseYMD(s) {
  var b = s.split(/\D+/);
  return new Date(b[0], --b[1], b[2]);
}

并使用：

调用它

<form onsubmit="return validateForm(this)" ...>

需要在javascript函数中更改日期格式

1 个答案:

修改