in my form I have three input fields name, email, mobile but I want to change input text box like -
name : _____________
email: _____________
mob : ___
In your CSS:
input[type=text] {
background: transparent;
border: none;
border-bottom: 1px solid #000000;
}
From here you can play with padding to position the actual text entry where you would like it. For instance, to have the line extend 5 pixels either side of the actual entry area:
padding: 2px 5px;