var Common = new Object();

Common.HideShow = function(elementIdToHide, elementIdToShow, showElementDisplayStyle)
{
    var elementToHide = document.getElementById(elementIdToHide);
    var elementToShow = document.getElementById(elementIdToShow);
    if (typeof (elementToHide) != 'undefined' && typeof (elementToShow) != 'undefined')
    {
        if (typeof (showElementDisplayStyle) == 'undefined')
        {
            showElementDisplayStyle = '';
        }
        elementToShow.style.display = showElementDisplayStyle;
        elementToHide.style.display = "none";
    }
}
Common.ChangeMainItem = function(mainItemId, newMainItemBackground)
{
    $("#" + mainItemId).css("background", newMainItemBackground);
}