JavaScript Javascript to validate date entered javascript validate date format,javascript validate date string,javascript validate

I am new to Javascript programming and I am trying to validate a date entered into an <input> from a calender snippet which is obtained from an external Javascript file. I am trying to validate the date to check if the user entered a past date. If the entered date is a past date, then I need to print a warning message to enter a valid date in future period.

I accept input date field in following HTML code:

<input size="12" id="inputField" name="inputField"  autofocus="" type="date"     oninput="return dateValidate(inputField)"/>

My Javascript function to validate input date is:

<script type="text/javascript">
function dateValidate(inputField)
{

 var v2 = document.getElementById('inputField');
 var pickeddate = new Date(v2.Value);
 todayDate = new Date();
 if(pickeddate > todayDate){
    return true;
 } else {
    alert("Enter a valid Date");
 }
}

But this code doesn't seem to be working. I want this Javascript function to be run when I enter a past date in the <input> field and tab out. I want to validate date when it is entered in the field, not when the form is submitted.

Answer:1

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