JavaScript Date Validation.

Hi My dear Friends here I am going to explain how to validate the date whether the User entered the Correct Date or Not in the aspx page.

<script type="text/javascript">

function ValidateDate() {

var validformat = /^\d{2}\-\d{2}\-\d{4}$/; //Basic check for format validity

var txtDate = document.getElementById('Your TextBox Control Id.');

var returnval = false;

if (!validformat.test(txtDate.value))

alert("Invalid Date Format. Please correct and submit again.")

else { //Detailed check for valid date ranges

var monthfield = txtDate.value.split("-")[1]

var dayfield = txtDate.value.split("-")[0]

var yearfield = txtDate.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 and submit again.");

else

returnval = true;

}

if (returnval == false) {

txtDate.select()

}

return returnval;

}

</script>

Note:

Call the ValidateDate in the button click like OnClientClick="return ValidateDate()”