Question

大家好我已经制作了一个脚本来验证表单我现在需要做的就是检查日期是不是过去的。我使用了一套substr但它似乎没有工作，请有人帮忙。下面是我的代码，日期部分是朝下。

function validateForm() {
// this part of the script will collate all errors into one should the user leave an input blank
var Fname=document.forms["myForm"]["fname"].value;
var Lname=document.forms["myForm"]["lname"].value;
var address=document.forms["myForm"]["addr1"].value;
var postcode=document.forms["myForm"]["pcode"].value;
var email=document.forms["myForm"]["email"].value;
var number=document.forms["myForm"]["tel"].value;
var date=document.forms["myForm"]["mydate"].value;
if (Fname==null || Fname=="" ||Lname==null || Lname=="" ||address==null || address=="" ||!postcode||!email||!number||( myForm.sex[0].checked == false ) && ( myForm.sex[1].checked == false )||(myForm.age[0].checked == false )&&(myForm.age[1].checked == false )&&(myForm.age[2].checked == false )&&(myForm.age[3].checked == false )&&(myForm.age[4].checked == false )||!date)
  {
  alert("Please make sure all fields are filled or checked correctly out ");
  return false;
  } 
  //end of collating script
  //start of postcode script
 var regPostcode = /^[a-zA-Z]{1,2}\d[\dA-Za-z]? \d[a-zA-Z]{2}$/;
if (!postcode.match(regPostcode))
{
    alert("That Post Code is incorrect, correct way mk4 4tr");
    return false;
}
//end of postcode script
//start of email script
var regEmail =/^\S+@\S+\.\S+$/;

if (!email.match(regEmail))
{
    alert("That email is incorrect");
    return false;
}


// end of email script
// start of phone number script
 var phonestring = /^(?:0|\+44)[12378]\d{8,9}$/;
if (!number.match(phonestring))
{
    alert(" incorrect,correct format 01908234874");
    return false;
}
// end of phone script
//start of gender script

if ( ( myForm.sex[0].checked == false ) && ( myForm.sex[1].checked == false ) ) 
{
alert ( "Please choose your Gender: Male or Female" ); 
return false;
}
// end of gender script
//start of age group script
if((myForm.age[0].checked == false )&&(myForm.age[1].checked == false )&&(myForm.age[2].checked == false )&&(myForm.age[3].checked == false )&&(myForm.age[4].checked == false )){
alert("please select an age group");
return false;
}
// end of age script
//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))
{
    alert("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");
    return false;
}
var today = new Date();

var courseYear =string.substr(6,4) // use substr or substring to capture the last four digits
var courseMonth =string.substr(3,2) // use substr or substring to capture the four and fifth digits
var courseDay = string.substr(0,2)// use substr or substring to capture the first and second digits

var dateToCompare = new Date(courseYear, courseMonth, courseDay);

if (dateToCompare < today) {
alert("this date is in the past"); 
return false; }

//end of date field
else
{ alert(" Thank you a member of our team will get back to you shortly");

return true;}
}

Answer 1

这看起来不对：

var courseYear = string.substr(6,4) // use substr or substring to capture the last four digits
var courseMonth = string.substr(3,2) // use substr or substring to capture the four and fifth digits
var courseDay = string.substr(0,2)//

应该是：

var courseYear =date.substr(6,4);
var courseMonth =date.substr(3,2);
var courseDay = date.substr(0,2);

否则一切正常：http://jsfiddle.net/balintbako/mKmaE/

您仍然可能需要考虑使用jquery插件进行表单验证。

Answer 2

不确定正则表达式是验证日期的最简单方法。在这里考虑答案：Test if date is valid。

将字符串转换为日期对象（2行代码）后，您可以使用以下方法测试它是否过去：

if ( d < new Date()) {
  // date is in the past
}

我认为坚持日期和月份的填充值没有任何价值，当然d / m / yyyy就足够了吗？

Answer 3

       $split_array = ($('#MyText_input_1').val());//alert($split_array);
       //ex. 31-Oct-2013
       /*** past date validation script ***/
        var c = $split_array[0]; // this is the format of the date coming in.
        var temp = new Array();
        temp = c.split('-');

        var x = new Date ( temp[1]+" "+temp[0]+", "+temp[2] );
        //alert((new Date().getTime()));
        if (x.getTime() < (new Date().getTime())) {
            alert('past date');
            return false;
        }
       /*** end script ***/

如果输入的日期是过去的日期验证

3 个答案: