function displayFeature(featurePosition)
{
    var controlString = "control" + featurePosition;
    var featureString = "feature" + featurePosition;
    var arrowString = "arrow" + featurePosition;

    var control = document.getElementById(controlString);
    var feature = document.getElementById(featureString);
    var arrow = document.getElementById(arrowString);
    
    if(control == null)
    {
        alert('can not find control');
        return;
        }
        if(feature == null)
    {
        alert('can not find feature');
        return;
        }
        if(arrow == null)
    {
        alert('can not find arrow');
        return;
        }

    if(feature.style.display == "none")
    {
        control.innerHTML="close";
        feature.style.display = "block";
        arrow.src="/hardware/gaming/images/signature/upArrow.bmp";
    }
    else
    {
        control.innerHTML="more";
        arrow.src="/hardware/gaming/images/signature/downArrow.bmp";
        feature.style.display = "none";
     }
}