D link validating
This lets you use Java Script code to establish a validation failure other than those offered by the standard constraint validation API.
The numbers in the second line above are only to assist readability; they indicate the reference points for each subexpression (i.e., each paired parenthesis).
Your view of the problem at hand is now biased, all the more reason why you need input from other users, to ensure you’re solving a real problem and not just one in your head.
Form validation helps us to ensure that users fill out forms in the correct format, making sure that submitted data will work successfully with our applications.
See also independent review; time-phased force and deployment data; verification.
To clarify, I’m looking for a decent regular expression to validate URLs that were entered as user input with.