//BUTTONS' MOUSE ACTIONS
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
    if (document.images && (preloadFlag == true)) {
        for (var i = 0; i < changeImages.arguments.length; i += 2) {
            document[changeImages.arguments[i]].src = changeImages.arguments[i + 1];
        }
    } else if (document.images && (preloadFlag2 == true)) {
        for (var i = 0; i < changeImages.arguments.length; i += 2) {
            document[changeImages.arguments[i]].src = changeImages.arguments[i + 1];
        }
    }
}


// Home page icons mouse overs
var preloadFlag = false;
function preloadImages() {
    if (document.images) {
        hm_icon_01_over = newImage("../Images/hm_icon_01_mo.jpg");
        hm_icon_02_over = newImage("../Images/hm_icon_02_mo.jpg");
        hm_icon_03_over = newImage("../Images/hm_icon_03_mo.jpg");
        hm_icon_04_over = newImage("../Images/hm_icon_04_mo.jpg");
        hm_icon_05_over = newImage("../Images/hm_icon_05_mo.jpg");
        hm_icon_06_over = newImage("../Images/hm_icon_06_mo.jpg");
        hm_icon_07_over = newImage("../Images/hm_icon_07_mo.jpg");
        hm_icon_08_over = newImage("../Images/hm_icon_08_mo.jpg");
        hm_icon_10_over = newImage("../Images/hm_icon_10_mo.jpg");
        preloadFlag = true;
    }
}


// Second page icons mouse overs
var preloadFlag2 = false;
function preloadImages2() {
    //every page has a js variable (pageIs) that stores page name. Based on the page name, display a coloured navi icon, display icon line and the description
    var naviElement = document.getElementById("divNavi" + pageIs);
    if (naviElement != null) naviElement.style.display = "none";
    
    naviElement = document.getElementById("imgNavi" + pageIs);
    if (naviElement != null) naviElement.style.display = "block";

    naviElement = document.getElementById("divCurrentPageLine" + pageIs);
    if (naviElement != null) naviElement.style.display = "block";

    naviElement = document.getElementById("tableDesc" + pageIs);
    if (naviElement != null) naviElement.style.display = "block";
    //end

    //also show extended description based on which page that is currently on
    naviElement = document.getElementById("naviDescCont" + pageIs);
    if (naviElement != null) naviElement.style.display = "block"; 
    //end
    
    

    if (document.images) {
        secondPg_icon_01_over = newImage("../Images/secondPg_icon_01_mo.jpg");
        secondPg_icon_02_over = newImage("../Images/secondPg_icon_02_mo.jpg");
        secondPg_icon_03_over = newImage("../Images/secondPg_icon_03_mo.jpg");
        secondPg_icon_04_over = newImage("../Images/secondPg_icon_04_mo.jpg");
        secondPg_icon_05_over = newImage("../Images/secondPg_icon_05_mo.jpg");
        secondPg_icon_06_over = newImage("../Images/secondPg_icon_06_mo.jpg");
        secondPg_icon_07_over = newImage("../Images/secondPg_icon_07_mo.jpg");
        secondPg_icon_07_over = newImage("../Images/secondPg_icon_08_mo.jpg");
        preloadFlag2 = true;
    }
}