function navigationChangeImage(areaName)
{
    var imgID = "navImg" + areaName;
    var img = document.getElementById(imgID);
    img.src = "Images/Icons/link_light.png";


    // Hide all sub menus
    var subMenus = new Array("navSubMenuAlexTech", "navSubMenuNews");

    
    for (i in subMenus)
    {
	// alert(subMenus[i]);
	var hideSubMenu = document.getElementById(subMenus[i]);
	//alert(subMenus[i]);
	hideSubMenu.setAttribute("class", "navigationSubMenuHidden");
	//hideSubMenu.class = "navigationSubMenuHidden";
    }


    // Show area sub menu
    var subMenu = document.getElementById("navSubMenu" + areaName);

    if(subMenu != null)
    {
	//subMenu.class = "navigationSubMenu";
	subMenu.setAttribute("class", "navigationSubMenu");
    }
}