Hi guys!
I've been working on a login form and I have some problems to validate the input data, I need to consist if the login and password fields aren't with spaces or no allowed characters, for this I've been used JavaScript for client-side validation, but if the fields are Ok, I need to call my php function to see if the user and pass are on mySQL database. I don't know how to "call" the php after the JavaScript validation. If someone could help me I will be thankful.