Js checks password strength and displays prompt information

Using Ajax implemented by javascipt to determine the strength of passwords, most websites with user registration functions will have such a function. As WEB programmers, they should write such small modules, if you don't understand it, let's look at this example. It seems quite simple. At the beginning, many people learned how to check the password strength.

Form to display the Password box and password strength prompt information:

 

JavaScript, mainly used to determine the password strength, here, a total of four user-defined functions are used to determine the type of the password string, mode statistics, return the password strength level, and display different colors based on the password box's loss of focus, with the warning password strength value, the specific code:

 

 

These two pieces of code can be merged into an HTML file. You don't need to say much about this.