Important JScript is Microsoft's implementation of ECMAScript, as defined by the specification of the European Computer Manufacturers Association.
Both Java Script and JScript are ECMAScript-compliant languages.
In this table, Element refers to the name of the HTML element for the form field, Type refers to the value of the type attribute for the form field, and Label refers to the text to the left of the form field. Form code updated with name attribute values Now that you have assigned names for the form and form fields, you are ready to start writing the script that handles the validation for the fields. If you are typing the Java Script code in this article manually and receive errors, you should check that all casing is the same as shown in this article.
Otherwise, you may want to review JScript Run-Time and Syntax errors.
The validation script in this article returns a Boolean value that specifies whether the data contained in the form is valid. Variables are not required, but they make accessing each field easier.
To create your own custom function, insert a SCRIPT element into the HEAD section of your form page; within the SCRIPT element, use the function statement to insert a function named Validate Contact Form. This code should look something like the following code sample. Starting script function To access the form fields within the code, you should create variables. For example, without a variable, you would have to type document. Name every time you needed to access the Name field.
Because the code is stored within the page or within a linked file, it is downloaded into the browser when a user accesses the page and, therefore, doesn't require a roundtrip to the server.
If you want to test this form, change this e-mail address to your own e-mail address.
However, client-side validation may not work in all instances.
A user may have a browser that doesn't support client-side scripting or may have scripting disabled in the browser.
Server-side validation incorporates code validation into a form handler. NET application on the server that provides the functionality that your form needs for processing after a customer has submitted it.
Because the code is stored on the server, server-side validation requires a roundtrip to the server.
Microsoft® Office Front Page® 2003 allows you to create some custom validation within the form feature.