Hidden input, Computer Engineering

Assignment Help:

Yet another type of input is HIDDEN input.

<INPUT TYPE=HIDDEN NAME="FORMNAME" VALUE="Friend Form 1">

A HIDDEN input is a value/name pair which is returned to you but doesn't show up anywhere on web page. The hidden input above is required for use with mailto Formatter (MTF). It's how MTF recognizes the forms it has to parse.

Assume you were a company trying to generate leads for a new product and there is a standard form for gathering information which has name, company, products, phone interested in, etc. Only problem is there are 6 slightly different versions of form in 6 different places. You need to know what's coming from where. What to do?

You can add a HIDDEN input to your forms like below:

<HTML>

<BODY>

<FORM METHOD=POST>

<INPUT TYPE=HIDDEN NAME="FORMNAME" VALUE="Version 1"> ...for the first version

<INPUT TYPE=HIDDEN NAME="FORMNAME" VALUE="Version 2"> ...for the second version

<INPUT TYPE=HIDDEN NAME="FORMNAME" VALUE="Version 3"> ...for the third version

</FORM>

</HTML>

By the way, it doesn't matter what name/value pair in the hidden input is (or any input for that matter).

<INPUT TYPE=HIDDEN NAME="E" VALUE="Mc^2">HIDDEN

Inputs are also useful for cgi scripts. For instance, many ISP's have a script you can have your forms sent to. It then sends form back to you properly formatted. Hidden input can be used to tell cgi script who you are, where to send parsed data and so on.


Related Discussions:- Hidden input

How is recursion handled internally, How is recursion handled internally? ...

How is recursion handled internally? Internally, every recursive call to a function requires storing the intermediate values of the parameters and local variables in a run time

Explain the differences between logical and physical address, Explain the d...

Explain the differences between Logical and physical address space Logical Vs physical address space (1) An address produced by the CPU is commonly referred to like a logica

What is microfilm, What is microfilm? This is a photographic reproducti...

What is microfilm? This is a photographic reproduction of a document greatly decreased in size from the original on fine grain, high resolution film. Microfilm needs a reader f

Visual perception problems, In AI the process of perception is studied ...

In AI the process of perception is studied as a set operations. A visual scene may be encoded by sensors and represented as matrix of intensity values. These are processed b

What are the functions of passes used in two-pass assembler, What are the f...

What are the functions of passes used in two-pass assembler? In an assembly language program, two pass translations can handle forward references early. The subsequent task

Drawbacks of specifying parameter assignments using defparam, The disadvant...

The disadvantages of specifying parameter assignments using defparam are: -  Parameter  is  essentially specified  by  the  scope  of  hierarchies  underneath  which  it exists

Explain the regular expression and transition diagram, State the relation a...

State the relation among Regular Expression, Transition Diagram and Finite State Machines. By using a simple instance establish your claim.   Answer: For each regular language,

Illustrate header section of a device driver, Q. Illustrate Header section ...

Q. Illustrate Header section of a device driver? Header comprises information which allows DOS to identify the driver. It also comprises pointers which allow it to chain to ot

Does average velocity differ from its instantaneous velocity, Q. When an ob...

Q. When an object travels with constant velocity does its average velocity during any time interval differ from its instantaneous velocity at any instant? Answer:- No It i

Phase - thermodynamics, Phase - Thermodynamics: A phase is quantity of...

Phase - Thermodynamics: A phase is quantity of matter that is homogeneous throughout in chemical composition and physical structure. If the matter is all gas, all liquid or

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd