It is used to give the different formats to the html form elements as well as programmer can take the input from user.

Fieldset is used to represent the group of different fields at one place and it is easier to understand.

By default fielsdset will extends from starting corner of browser to ending corner.

In order to reduce the dimensions of the fieldset,programmers have to make use of CSS properties like 'height' and 'width' in the "style" attribute.

Legend tag is used to provide the content on the line of the fieldset.

Pixel is the measurement unit to measure the width and height in the CSS programming.It us represented by 'px'

To disappear the input box on ythe browser,we have to make use of CSS properties as border:0px and outline:0px

Note :When user clicks on the input box thick line will appear around the input box it is called as outline.