activeMenuPage = 0;

function setMenuArrow()
{
    if (activeMenuPage != 0)
    {
        document.getElementById("ctl00_MENUARROW1").src = menuArrowImageBlank;
        document.getElementById("ctl00_MENUARROW2").src = menuArrowImageBlank;
        document.getElementById("ctl00_MENUARROW3").src = menuArrowImageBlank;
        document.getElementById("ctl00_MENUARROW4").src = menuArrowImageBlank;
        
        document.getElementById("ctl00_MENUARROW" + activeMenuPage).src = menuArrowImage;
    }
}