<input id="radio1" type="radio" name="rgroup" value="1" >
<label for="radio1"><span><span></span></span>1</label>
<input id="radio2" type="radio" name="rgroup" value="2" >
<label for="radio2"><span><span></span></span>1</label>
Presented above are some radio buttons with associated labels. I am seeking a way to use JavaScript to dynamically add an image element to the label that corresponds to the checked radio button. Is this feasible?
Do you think it's necessary to include a specific class for the checked radio button? You can achieve the same effect using CSS alone:
#radio1:checked + label {
color: #f00;
}
#radio1:checked + label:after {
content: url(IMAGE_URL_HERE);
}
See another demo with an image embedded when the radio box is selected
Give this a shot:
input[type="radio"]:checked + label {
background-image: url("your_image_url_here");
background-repeat: no-repeat;
background-position: center left; /* or center right */
}
To begin, locate the radio button that has been checked:
function getCheckedRadioId(name) {
var elements = document.getElementsByName(name);
for (var i=0, len=elements.length; i<len; ++i)
if (elements[i].checked) return elements[i].value;
}
Next, insert an image into the selected element.
var img = document.createElement("img");
img.src = "http://www.google.com/intl/en_com/images/logo_plain.png";
var src = getCheckedRadioId(rgroup);
src.appendChild(img);
src.parentNode.insertBefore(img, src.nextSibling);
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