JavaScript Validate UK Date

How to Validate UK Date in JavaScript

View Answers

March 29, 2012 at 5:41 PM

<SCRIPT>    
function validateDate(dtControl)
    {
        var input = document.getElementById(dtControl)
        var validformat=/^\d{1,2}\/\d{1,2}\/\d{4}$/ //Basic check for format validity
        var returnval=false
        if (!validformat.test(input.value))
        alert('Invalid Date Format. Please correct.')
        else{ //Detailed check for valid date ranges
        var dayfield=input.value.split("/")[0]
        var monthfield=input.value.split("/")[1]
        var yearfield=input.value.split("/")[2]

        var dayobj = new Date(yearfield, monthfield-1, dayfield)
        if ((dayobj.getMonth()+1!=monthfield)||(dayobj.getDate()!=dayfield)||(dayobj.getFullYear()!=yearfield))
        alert('Invalid Day, Month, or Year range detected. Please correct.')
        else
        {
            returnval=true
        }
        }
        if (returnval==false) input.focus()
        return returnval
    }
    </SCRIPT>

    <input type="text" id="m_txtDate" onBlur="validateDate('m_txtDate')">

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