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Not all of these are validation functions, but many are helpful. field is only enforced by the browser, so you still need to validate the length of the input on the server.

Top ↑ You can write your own PHP and Java Script functions and include them in your plugin. If you don’t, an attacker could alter the maxlength value.

The problem arises when i validate multiple groups. NET mobile web forms pages, we can use nearly all the features of ASP. But there are a couple of compatibility issues: Error Handling and Reporting. I have 7 textboxes which need to be validated, 2 of which can be left blank but if one of these 2 is filled in then the other must be also.

When there are many fields in the form, the Java Script validation becomes too complex.

The Java Script class presented here makes the form validations many times easier.

All data should be validated on the server side as it can't be circumvented by the end user, however you may want to make your applications and forms more responsive by allowing people to see validation as they're typing in, rather than having to wait until they've submitted the form to see the results.

If you were only to use server side data validation the user would have to submit the form before they were able to see any error messages, however if you also use javascript, users can see if they're typing in invalid data as they're filling out the form, down to each individual key depression if you like.

The script has a catalog of almost all the common validation types built-in.

The idea is to create a set of “validation descriptors” associated with each element in a form.

I...validating validation controls using javascript I need to validate multiple validation groups(a normal group would consist of Required Field Validators, Regular Expression Validators, Validation Summary, etc) using javascript.

I am using Page_Client Validate("Group Name") to validate the groups. Validating form textboxes using Javascript I have had a look around the forum for information on how to validate multiple textboxes and only found answers for 1 texbox.

Although data validation is the answer, you shouldn't just do it on the client side (i.e.

with javascript) as the second somone turns off javascript in their browser, you're back to square 1 in terms of security.

Use Online Javascript Validator to validate javascript code and find errors and warnings of your code that can be fixed.