Style a checkbox in firefox — remove check and border

Question

How do I style a checkbox in firefox, and have the checkmark and border disappear?

http://jsfiddle.net/moneylotion/qZvtY/

CSS:

body { background: black; }
#conditions-form { color: white; }
#conditions-form input[type=checkbox] {
    display:inline-block;
    -webkit-appearance: none;
    -moz-appearance: none;
    -o-appearance:none;
    appearance: none;
    width:19px;
    height:19px;
    background: url('http://demo.somedomain.com/wp-content/themes/themename/images/care-plan-checkbox.gif') no-repeat top left;
    cursor:pointer;
}
#conditions-form input[type=checkbox]:checked {
    background:url('http://demo.somedomain.com/wp-content/themes/themename/images/care-plan-checkbox-checked.gif') no-repeat top left;
}

HTML:

<form id="conditions-form">
    <ul>
        <li>
            <input id="condition3" type="checkbox" name="conditions[condition3]"></input>
            <label class="checkbox" for="condition3">Conditions 3</label>
        </li>
    </ul>
</form>

Answer 1

There's a quite easy way you can do this via <label> tags. Just place a label around the checkbox, and insert a dummy element that will be used for the custom styled checkbox. For example:

label.checkbox input[type="checkbox"] {display:none;}
label.checkbox span {
  display:inline-block;
  border:2px solid #BBB;
  border-radius:10px;
  width:25px;
  height:25px;
  background:#C33;
  vertical-align:middle;
  margin:3px;
  position: relative;
  transition:width 0.1s, height 0.1s, margin 0.1s;
}
label.checkbox :checked + span {
  background:#6F6;
  width:27px;
  height:27px;
  margin: 2px;
}
label.checkbox :checked + span:after {
  content: '\2714';
  font-size: 20px;
  position: absolute;
  top: -2px;
  left: 5px;
  color: #99a1a7;
}

<label class="checkbox">
  <input type="checkbox"/>
  <span></span>
  I like cake
</label>

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EDIT: Note that some choices of colours might render the state of your checkbox invisible for colourblind people. When making this code I didn't think of that, but the above demo might be invisible for R/G colourblind people. When implementing this, please do keep that in mind (pick bright/dark colours for example, or show some difference in shape)

---

The styles I used are just arbitrary, and you can change that to anything you want. You can even toggle certain text inside it via the ::before pseudo-element, such as what I've done here.

I wasn't able to open the image url you provided to use in your question, but I think you'll be able to include whatever image you want by simply modifying this code a little. Just change the current background color to the image URL you want to use.

Note: This won't work in some older browsers.