How to use readOnly in javascript.

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i have 3 textbox for first name, middle name and last name.... i want to make middle name readonly unless one doesn't input the 1st name in the text box. plz can anyone help me out??????

Posted 23-Mar-14 20:46pm

Member 10693938

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Sergey Alexandrovich Kryukov · Answer 1 · 2014-03-23T20:53:00

Solution 2

You can manipulate the attribute readonly. Please see:
http://www.w3schools.com/tags/tag_input.asp[^],
http://www.w3schools.com/tags/att_input_readonly.asp[^].

For example:

JavaScript

document.getElementById("yourElementId").readOnly = true;

I would highly recommend using jQuery:
http://forums.asp.net/t/1702179.aspx?How+to+set+readonly+textbox+via+js+jquery[^],
for example: http://forums.asp.net/t/1702179.aspx?How+to+set+readonly+textbox+via+js+jquery[^].

—SA

Posted 23-Mar-14 20:53pm

Sergey Alexandrovich Kryukov

Updated 23-Mar-14 20:59pm

v2

Comments

Member 10693938 24-Mar-14 3:08am

actually m not using it in asp.net... i am using in html

Ankur^\m/ 24-Mar-14 3:12am

First two links still holds valid. Did you check them?

Sergey Alexandrovich Kryukov 24-Mar-14 3:14am

Anything in this answer is valid. This is Javascript problem. I have no idea where OP managed to see ASP.NET.
Thank you.
—SA

Ankur^\m/ 24-Mar-14 3:23am

I am sorry I didn't check other two links. Still the point here is JavaScript provides a 'readOnly' property for elements on the page which can be used to toggle a controls read only attribute. Even I don't understand why it is not clear to the OP.

Sergey Alexandrovich Kryukov 24-Mar-14 11:01am

Sure.
Thank you.
—SA

Sergey Alexandrovich Kryukov 24-Mar-14 3:13am

Your comment makes no sense at all. Who told you a single word about ASP.NET? The solution is about Javascript.
So, forget about "ASP.NET" and use it. Please don't forget to accept it formally (green "Accept" button).
—SA