function ImageCheckoBox_Click(prefixId) {
    var checkBox = document.getElementById(prefixId + 'DivNiceCheckBoxImage');
    checkBox.className = checkBox.className == "div_niceCheckBoxImageSelected" ? "div_niceCheckBoxImageUnselected" : "div_niceCheckBoxImageSelected";
    var hidden = document.getElementById(prefixId + 'HiddenFieldChecked');
    hidden.value = hidden.value == "1" ? "0" : "1";

    var checkBoxOnChange = document.getElementById(prefixId + 'HiddenFieldOnChange').value;
    if (checkBoxOnChange != "") {
        var params = checkBoxOnChange.substring(checkBoxOnChange.indexOf('(') + 1, checkBoxOnChange.indexOf(')'));
        if (params != "") {
            params = params.split(',');
            window[checkBoxOnChange.substring(0, checkBoxOnChange.indexOf('('))].apply(this, params);
        }
        else {
            window[checkBoxOnChange.substring(0, checkBoxOnChange.indexOf('('))]();
        } 
    }
}