There are other event handlers, many belonging to forms.
These terms are by no means standard, although the concepts we present here are typical for web-application testing.
In this document, we have discussed Java Script Form Validation using a sample registration form.
When you restrict the values that users can enter in forms, you reduce the chance that someone can enter a value that can compromise the security of your site.
To see how validation works, run this page and deliberately make mistakes.
This input type lets you collect a number (either integer or floating point). The exact value is not displayed to the user unless you use Java Script.
HTML5 defines a variety of new input types: sliders, number spinners, popup calendars, color choosers, autocompleting suggest boxes, and more.
The beauty of these elements is that you can use them now: for browsers that don't support a particular input type, there is automatic fallback to standard textfields.
When users enter values into an HTML form, the values that they enter are strings.
In many cases, the values you need are some other data types, like integers or dates.For each type of input element, we use the code to detect if your browser supports it. You should normally supply all of value, min, and max.