Validating date java
In Java Script to check for different month lengths, particularly for February in leap years, you need quite a bit of extra code.I'm not going to show that here, but you can find a link to get started under References below. Similar to this setup from another example: With Ajax you can make use of more powerful server-side functions and don't have to include large Java Script libraries for validating dates and other values. Just be aware that it means more requests to the server which can be slower than downloading and running Java Script code.
Basically, for each of the regular expression tests, an array is returned holding each component of the pattern that we've matched.For example, when the date is checked, the return value, , is an array with elements 1 through 3 containing the day, month and year components of the input string.For the time check, the array returned includes the hour (pos 1), minutes (pos 2) and, optionally, the am/pm string (pos 3).Each of these values is then tested against an allowed range (days: 1 - 31; months: 1 - 12; years: 1902 - 2018; and so on).This script only confirms that the input format is correct and that each individual value falls within its allowed range.