function SetErrorMsg(sender, newMsg) {
    sender.children[1].innerText = newMsg; //i.e.
    sender.children[1].textContent = newMsg; //Mozilla 
}

function SetErrorImage(sender, imageURL) {
    sender.children[0].src = imageURL; 
}

function SetErrorColour(sender, colourHex) {
    sender.children[1].style.color = colourHex; 
}

function SetErrorVisibility(sender, showBool) {
    if (showBool) {
        sender.children[0].style.display = '';
        sender.children[1].style.display = '';
    }
    else {
        sender.children[0].style.display = 'none';
        sender.children[1].style.display = 'none';    
    }
}