Validating date format
Otherwise you can end up with values in the database that have no relation to reality.In this example, the date fields will only accept input that matches the pattern 'dd/mm/yyyy' (this could just as easily be changed to 'yyyy-mm-dd' or 'mm/dd/yyyy').The expressions use a pre-defined class is returned which enables the form to be submitted.This routine DOES NOT check that the date or time input values are valid, just that they match the required format (d/m/y and h:m). Once you're in control of the input format, it's a lot easier to check that the values are actually valid.The function has been improved now so that the day, month and year values are checked to ensure that they're in the right ball-bark (ie. Also the year must be between 1902 and the current year.
When capturing information for insertion into a database, or use in other processing, it's important to control what the user can enter.
It is very important to validate the data supplied by the user through a form before you process it. In the following examples, a Java Script function is used to check a valid date format against a regular expression.
Among various kind of data validation, validation of date is one. Later we take each part of the string supplied by user (i.e.
In this tutorial, we discussed how you can perform Java Script date validation in 1. dd, mm and yyyy) and check whether dd is a valid date, mm is a valid month or yyyy is a valid year.
We have also checked the leap year factor for the month of February.
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For the time check, the array returned includes the hour (pos 1), minutes (pos 2) and, optionally, the am/pm string (pos 3).