How do I disable TextBox using JavaScript?

Question

earlier I asked for help disabling a Button when a drop down menu item was selected. I was given some code that did the trick but now I need the same with a Textbox and for some odd reason its not working can you have a look for me...

HTML:

<form id="frmColor">
    <input type='TextBox' id='color' />
    <input type='submit' value='Change Color' id="colorSubmit"/>
 </form>

Javascript:

  tools.eraser = function () {
    var tool = this;
    this.started = false;
    var varPenColor = "White";
    context.strokeStyle = varPenColor;
    document.getElementById('frmColor').colorSubmit.disabled=true;
    document.getElementById('frmColor').color.disabled=true;

Any ideas why it wont disable the text box?

Thanks

Solution 1

Form elements can be accessed via the form's DOM element by name, not by "id" value. Give your form elements names if you want to access them like that, or else access them directly by "id" value:

document.getElementById("color").disabled = true;

edit — oh also, as pointed out by others, it's just "text", not "TextBox", for the "type" attribute.

You might want to invest a little time in reading some front-end development tutorials.

Solution 2

With the help of jquery it can be done as follows.

$("#color").prop('disabled', true);

Solution 3

Here was my solution:

Markup:

<div id="name" disabled="disabled">

Javascript:

document.getElementById("name").disabled = true;

This the best solution for my applications - hope this helps!

Comments

[Patrick Ferreira]

type TextBox don't exists ... use instead <input type="text" id="color" /> link

[Angel Politis]

The accepted answer has already provided the solution you recommend 5+ years ago!

[Admin]

jQuery is not JavaScript. please do not answer JavaScript questions with jQuery responses.

[John Lord]

actually it is. It's written entirely in javascript.