//global variables that can be used by ALL the function son this page.
var inputs;
//var imgFalse = '/IMG/D/F_16.png';
//var imgTrue = '/IMG/D/F_ON_16.png';

//this function runs when the page is loaded, put all your other onload stuff in here too.
function init() {
    replaceChecks();
    //initialize();
}

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++) {
        if (inputs[i].className != null && inputs[i].className != "") continue;
        //check if the input is a checkbox
        if (inputs[i].getAttribute('type') == 'checkbox') {

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

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

            //set image ID and onclick action
            img.id = 'checkImage' + i;
            //if(inputs[i].getAttribute('onclick') != null && inputs[i].getAttribute('onclick') != "") 
            //img.setAttribute('onclick',inputs[i].getAttribute('onclick'));
            //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';

        } 
        /*
        else if (inputs[i].getAttribute('type') == 'text' || inputs[i].getAttribute('type') == 'password') {
            if (inputs[i].className == null || inputs[i].className == "") inputs[i].className = "longfield";
        } else if (inputs[i].getAttribute('type') == 'submit') {
            if (inputs[i].className == null || inputs[i].className == "") inputs[i].className = "valider";
        }*/
    }

}

//change the checkbox status and the replacement image
function checkChange(i) {

    if (inputs[i].checked) {
        inputs[i].checked = '';
        document.getElementById('checkImage' + i).className = "checkboxFalse";
        //inputs[i].onclick();
        //document.getElementById('checkImage'+i).src=imgFalse;
    } else {
        inputs[i].checked = 'checked';
        document.getElementById('checkImage' + i).className = "checkboxTrue";
        //document.getElementById('checkImage'+i).src=imgTrue;
        //inputs[i].onclick();
    }
}

window.onload = init;