Validating a date in javascript

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We have also provided the javascript date validation for the dd/mm/yyyy format.If the valid date character is changed please make sure you replace it in the HTML and Javascript code too.By Tom Flynn, Sun Gard Higher Education, and Jeralee Seaburn, Hercules Tire Problem: Started in a Focal Point post, the question is, how to validate Date (calendar) controls in a guided ad-hoc HTML page?There have been so many problems with users not entering the date in mm/dd/yyyy, even when specifically stated on the screen.These functions can even be included from an external javascript file so that the browser can cache them, and so the programmer isn't always copying and pasting.In this case, we've created a stand-alone functions which will validate a date field: In each case the value passed to the function is the form field rather than the field value.Solution: Tom Flynn from Sun Gard Higher Education provided the following Jave Script, which helped resolving the issue, so many thanks to Tom!function Validate Form(ctrl) //-------------------------------------------------------------------------- //This function verifies if the start date is prior to end date.

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When you enter a date in the format dd/mm/yyyy the value is sent via an Ajax call to the server where it is validated using the PHP checkdate function.

Each of these values is then tested against an allowed range (days: 1 - 31; months: 1 - 12; years: 1902 - 2019; and so on).

This script only confirms that the input format is correct and that each individual value falls within its allowed range.

If not, the input is compared to the regular expression.

The expressions use a pre-defined class is returned which enables the form to be submitted.

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