changing textbox border colour using javascript

Question

I\'m doing form validation. when the form input is incorrect i add a red border to the textbox:

document.getElementById(\"fName\").style.borderColor=\"#FF000         


        

Answer 1

If the users enter an incorrect value, apply a 1px red color border to the input field:

document.getElementById('fName').style.border ="1px solid red";

If the user enters a correct value, remove the border from the input field:

document.getElementById('fName').style.border ="";