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I need to validate my birth dates in my signup form a valid date must not be in the future, and no non-existent dates e.g 31 june is there an easy way to do this without coding for each month?

droo
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3 Answers3

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If you are using jQuery datepicker you can use this code:

$("#born_date").datepicker({
    changeYear: true,
    changeMonth: true,
    maxDate: '+0d', 
    yearRange: '-90:+0',
    numberOfMonths: 1
});

Best regards!

paulalexandru
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Borza Adrian
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  • I prefer to use the old selectbox format and validate the form data than a plugin I just need the code to validate a selectbox with a day, month and year field – droo Apr 18 '14 at 14:14
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If you want to do this manually.. This code should suffice (I'm pretty sure the pattern supports dd/mm/yyyy).

function checkDateTime(newDate) {
    var pattern = '^(?:(?:31(\/|-|\.)(?:0?[13578]|1[02]))\1|(?:(?:29|30)(\/|-|\.)(?:0?[1,3-9]|1[0-2])\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})$|^(?:29(\/|-|\.)0?2\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:0?[1-9]|1\d|2[0-8])(\/|-|\.)(?:(?:0?[1-9])|(?:1[0-2]))\4(?:(?:1[6-9]|[2-9]\d)?\d{2})$';
    var regex = new RegEx(pattern);

    if (typeof newDate === 'string' && newDate.trim().match(regex)) {
        var parsedDate = new Date(newDate);
        var today = new Date();
        if (parsedDate.getTime() >= today.getTime()) {
            //The date is valid...
        }
    }
}
Community
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classicjonesynz
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  • thank you for the answer I eventually coded the entire thing manually using javascript it was relatively easy since there are only 7 months that end on the 31st in a year – droo Apr 25 '14 at 03:32
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Use Javascript in combination with html5 validation pattern:

<input type="text" pattern="(0[1-9]|1[0-9]|2[0-9]|3[01])/(0[1-9]|1[012])/[0-9]{4}"
 onchange="this.className = Date.parse(this.value) < Date.now() && 'valid'">

Find more patterns here: http://html5pattern.com/Dates

If someone

Christian Landgren
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