function isChecked(curField, isRequired, message)
{
    var checkedValue = "";
    var length = curField.length;
    
    if (length == undefined)
    {
        if (!curField.checked)
        {
            alert(message);
            return false;
        }
        
        return true;
    }
    
    if (length <= 0)
    {
        alert(message);
        return false;
    }
    
    for (count = 0; count < length; count++)
    {
        if (curField[count].checked)
        {
            checkedValue = curField[count].value;
        }
    }
    
    if (checkedValue == "")
    {
        alert(message)
        return false;
    }
    
    return true;
}