// Function changes footer under projcts menus
function changeProjectsMenuFooter(n) {
	var f = document.getElementById('projectsMenuFooter') || document.getElementById('projectsSideMenuFooter');
	if (typeof(n) == "string") f.innerHTML = n.substring(n.indexOf('Text:')+5);
	else if (n.alt) f.innerHTML = n.alt;
	else f.innerHTML = " ";
}

var cnt = 0;
function ImageDisplay(n) {
	cnt += n;
	/* if (cnt >= 0 && cnt < displayImages.length) */ showLoading();
	var displayImage = document.getElementById('projectDisplayImage');
	var displayCount = document.getElementById('displayCount');
	var displayLink = document.getElementById('projectDisplayLink');
	if (cnt < 0) cnt = displayImages.length-1; // loop to end
	else if (cnt >= displayImages.length) cnt = 0; // loop to beginning
	if (displayImage) displayImage.src = displayImages[cnt];
	if (displayLink) displayLink.href = displayLinks[cnt];
	if (displayCount) displayCount.innerHTML = cnt+1;
}

function showLoading() {
	document.getElementById('imgLoading').style.display = "";
}

function hideLoading() {
	document.getElementById('imgLoading').style.display = "none";
}

// Script to scroll thumbs on project pages
function TextScroll(scrollname, div_name, up_name, down_name)
{
    this.div_name = div_name;
    this.name = scrollname;
    this.scrollCursor = 0;
    this.speed = 8;
    this.timeoutID = 0;
    this.div_obj = null;
    this.up_name = up_name;
    this.dn_name = down_name;

{
        if (document.getElementById) {
            div_obj = document.getElementById(this.div_name);
            if (div_obj) {
                this.div_obj = div_obj;
                this.div_obj.style.overflow = 'hidden';
            }
            div_up_obj = document.getElementById(this.up_name);
            div_dn_obj = document.getElementById(this.dn_name);
            if (div_up_obj && div_dn_obj) {
				div_up_obj.onmouseover = function() { eval(scrollname + ".scrollUp();") };
				div_up_obj.onmouseout = function() { eval(scrollname + ".stopScroll();") };
				
				div_dn_obj.onmouseover = function() { eval(scrollname + ".scrollDown();") };
				div_dn_obj.onmouseout = function() { eval(scrollname + ".stopScroll();") };
            }
        }
    }

this.stopScroll = function() {
        clearTimeout(this.timeoutID);
    }

this.scrollUp = function() {
        if (this.div_obj) {
            this.scrollCursor = (this.scrollCursor - this.speed) < 0 ? 0 : this.scrollCursor - this.speed;
            this.div_obj.scrollTop = this.scrollCursor;
            this.timeoutID = setTimeout(this.name + ".scrollUp()", 60);
        }
    }

this.scrollDown = function() {
		if (this.div_obj) {
			this.scrollCursor += this.speed;
			this.div_obj.scrollTop = this.scrollCursor;
			if (this.div_obj.scrollTop == this.scrollCursor) {
				this.timeoutID = setTimeout(this.name + ".scrollDown()", 60);
			} else {
				this.scrollCursor = this.div_obj.scrollTop;
			}
		}
	}

this.resetScroll = function() {
        if (this.div_obj) {
            this.div_obj.scrollTop = 0;
            this.scrollCursor = 0;
        }
    }
}