//global variables that can be used by ALL the function son this page.
var inputs;
var imgFalse ='http://7est.ro/api/media/img/poll/radio_off.jpg';
var imgTrue = 'http://7est.ro/api/media/img/poll/radio_on.jpg';
var checked_id;
function replaceRadios() {

    //get all the input fields on the page
    inputs = $('poll_holder').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') == 'radio') {

            //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('checkChange('+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 checkChange(i) {
    if(!inputs[i].checked) {
        try {
            inputs[checked_id].checked = '';
            document.getElementById('checkImage'+checked_id).src=imgFalse;
        } catch(e) {
        }
        inputs[i].checked = 'checked';
        document.getElementById('checkImage'+i).src=imgTrue;
        checked_id = i;
    }
}