问将图像添加到html类型输入复选框或单选按钮

EN

<html>
<script type="text/javascript">
//global variables that can be used by ALL the function son this page.
var inputs;
var imgFalse = '52 0 ROff.png';
var imgTrue = '52 0 ROn.png';

//replace the checkbox with an image and setup events to handle it
function replaceChecks() {
    //get all the input fields on the page
    inputs = document.getElementsByTagName('input');

    //cycle trough the input fields
    for(var i=0; i<inputs.length; i++) {

    //check if the input is a checkbox
    if(inputs[i].getAttribute('type') == 'checkbox') {

        //create a new image
        var img = document.createElement('img');

        //check if the checkbox is checked
        if(inputs[i].checked) {
            img.src = imgTrue;
        } else {
            img.src = imgFalse;
        }

        //set image ID and onclick action
        img.id = 'checkImage'+i;
        //set image
        img.onclick = new Function('checkClick('+i+')');

        //place image in front of the checkbox
        inputs[i].parentNode.insertBefore(img, inputs[i]);

        //hide the checkbox
        inputs[i].style.display='none';
    }
}
}

//change the checkbox status and the replacement image
function checkClick(i) {
if(inputs[i].checked) {
    inputs[i].checked = '';
    document.getElementById('checkImage'+i).src=imgFalse;
} else {
    inputs[i].checked = 'checked';
    document.getElementById('checkImage'+i).src=imgTrue;
}
}

</script>
</html>
<body>
<input type="checkbox" />
<script type="text/javascript">replaceChecks();</script>
</body>

  <div class="had">
        <div class="ch">
            <input type="checkbox" id="sho1" name="chk1">
            <div class="so"></div>
            <label for="sho1">Select one</label>
        </div>
        <div class="ch">
            <input type="checkbox" id="sho2" name="chk2">
            <div class="so"></div>
            <label for="sho2">Select two</label>
        </div>
    </div>

    input {
               display: none;
    }

        input [type=checkbox]:checked+.so{
              background-image:url('http://goo.gl/3tza1X');
              background-repeat:no-repeat;background-color:green;
              border-radius:50%;background-position: -2px -1px;
    }

        input [type=checkbox]:checked+.so+label{
           color: red;
    }

        .so {
             margin: 2px; float: left;height: 30px;width: 30px;
             border: 3px solid #D8D8D8;background-color: #4679BD;
             border-radius: 5px;
    }

        .show {
               margin-left: 30px;
    }

        .had {
               margin: 50px auto;width: 50%;border: 1px solid black;
               height: 30px;padding:10px;
    }

        .ch {
              float: left;margin-left:20px;width:40%
    }

        label {
               height: 30px;width: 100%;position:relative;
               display:block;margin-top: 5px;
    }