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hidden variable?

ankur rathi
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Joined: Oct 11, 2004
Posts: 3830
Dear all,

What is hidden variable and how to add and send them with request? Why we use them?

Thanks.
William Brogden
Author and all-around good cowpoke
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Joined: Mar 22, 2000
Posts: 12678
    
    5
I am guessing that you mean a hidden field in an HTML form.
As far as servlet request objects are concerned, the value in a hidden field is treated just like other form values.
You can write a value into a field when the html page is created or have Javascript put a value there.
Use hidden fields for any text value that you want to have submitted with the request but that you don't want the user to see or modify.
Bill


Java Resources at www.wbrogden.com
ankur rathi
Ranch Hand

Joined: Oct 11, 2004
Posts: 3830
Originally posted by William Brogden:
I am guessing that you mean a hidden field in an HTML form.
As far as servlet request objects are concerned, the value in a hidden field is treated just like other form values.
You can write a value into a field when the html page is created or have Javascript put a value there.
Use hidden fields for any text value that you want to have submitted with the request but that you don't want the user to see or modify.
Bill


Thanks William. I got it completely.

But, how to write them in HTML page or through Javascript? Please, could some body give me code...

Thanks.
Bear Bibeault
Author and ninkuma
Marshal

Joined: Jan 10, 2002
Posts: 60053
    
  65

The HTML 4 Specification.

Also an excellent HTML 4 reference.
[ December 11, 2005: Message edited by: Bear Bibeault ]

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Gaurav Chhabras
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Joined: Sep 21, 2005
Posts: 126
example is -:

<input type="hidden" name="user_name" value="">

then this field will go to next page as you submit the page but not being able to view bu the user
 
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