// SM 31.01.02 Copyright Enzyme Design Ltd	var its;

var browserName;
var browserNameLong;
var browserNew;
var preloadFlag = false;
var Macintosh = navigator.userAgent.indexOf('Mac')>0;

function its() {
	var n = navigator;
	var ua = ' ' + n.userAgent.toLowerCase();
	var pl = n.platform.toLowerCase();
	var an = n.appName.toLowerCase();

	// browser version
	this.version = n.appVersion;
	this.nn = ua.indexOf('mozilla') > 0;

	// 'compatible' versions of mozilla aren't navigator
	if(ua.indexOf('compatible') > 0) {
		this.nn = false;
	}

	this.opera = ua.indexOf('opera') > 0;
	this.ie = ua.indexOf('msie') > 0;
	this.major = parseInt( this.version );
	this.minor = parseFloat( this.version );

	// platform
	this.mac = ua.indexOf('mac') > 0;
	this.win = ua.indexOf('win') > 0;

	// workaround for IE5 which reports itself as version 4.0
	if(this.ie) {
		if(ua.indexOf("msie 5") > 1) {
		var msieIndex = navigator.appVersion.indexOf("MSIE") + 5;
		this.major = parseFloat(navigator.appVersion.substr(msieIndex,3));
		}
	}
	return this;
}

function browserNaming() {
	its = new its();

	// is it a DOM-enabled browser?
	if (!document.getElementById) {
		browserNew = false;
	}
	else {
		browserNew = true;
	}

	// need the name, too
	if (its.opera) {
		browserName = "Opera";
	}
	else if (its.ie) {
		browserName = "IE";
	}
	else {
		browserName = "NS";
	}

	// and the number
	browserNameLong = browserName + its.major;

}

// GETS THE BROWSER NAME
browserNaming();

// GEEEET's DHTML SCROLLER
// DONE BY GEEEET@GHTML.COM
// The graphical elements
var upH = 16; // Height of up-arrow
var upW = 16; // Width of up-arrow
var downH = 16; // Height of down-arrow
var downW = 16; // Width of down-arrow
var dragH = 21; // Height of dragger
var dragW = 16; // Width of dragger
var scrollH = 253; // Height of scrollbar
var speed = 4; // Scroll speed
// Some different variables
var dom = document.getElementById ? true:false;
var nn4 = document.layers ? true:false;
var ie4 = document.all ? true:false;
var mouseY; // Mouse Y position onclick
var mouseX; // Mouse X position onclick
var clickUp = false; // If click on up-arrow
var clickDown = false; // If click on down-arrow
var clickDrag = false; // If click on scrollbar
var clickAbove = false; // If click above scrollbar
var clickBelow = false; // If click below scrollbar
var timer = setTimeout("",500); // Repeat variable
var upL; // Up-arrow X
var upT; // Up-arrow Y
var downL; // Down-arrow X
var downT; // Down-arrow Y
var dragL; // Scrollbar X
var dragT; // Scrollbar Y
var rulerL; // Ruler X
var rulerT; // Ruler Y
var contentT; // Content layer Y;
var contentH; // Content height
var contentClipH; // Content clip height
var scrollLength; // Number of pixels scrollbar should move
var startY; // Keeps track of offset between mouse and span
// Mousedown
function down(e){
	if((document.layers && e.which!=1) || (document.all && event.button!=1)) return true;
		getMouse(e);
		startY = (mouseY - dragT);
		// If click on up-arrow
		if(mouseX >= upL && (mouseX <= (upL + upW)) && mouseY >= upT && (mouseY <= (upT + upH))){
			clickUp = true;
			return scrollUp();
		}
		// Else if click on down-arrow
		else if(mouseX >= downL && (mouseX <= (downL + downW)) && mouseY >= downT && (mouseY <= (downT + downH))){
			clickDown = true;
			return scrollDown();
		}
		// Else if click on scrollbar
		else if(mouseX >= dragL && (mouseX <= (dragL + dragW)) && mouseY >= dragT && (mouseY <= (dragT + dragH))){
			clickDrag = true;
			return false;
	}

		else if(mouseX >= dragL && (mouseX <= (dragL + dragW)) && mouseY >= rulerT && (mouseY <= (rulerT + scrollH))){
			// If click above drag
			if(mouseY < dragT){
				clickAbove = true;
				clickUp = true;
				return scrollUp();
				}
			// Else if click below drag
			else{
				clickBelow = true;
				clickDown = true;
				return scrollDown();
			}
		}

	// If no scrolling is to take place
	else{
		return true;
	}
}

// Drag function
function move(e){
	if(clickDrag && contentH > contentClipH){
		getMouse(e);
		dragT = (mouseY - startY);
		if(dragT < (rulerT))
			dragT = rulerT;
		if(dragT > (rulerT + scrollH - dragH))
			dragT = (rulerT + scrollH - dragH);
		contentT = ((dragT - rulerT)*(1/scrollLength));
		contentT = eval('-' + contentT);
		moveTo();
	// So ie-pc doesn't select gifs
		if(ie4)
			return false;
	}
}

function up(){
	clearTimeout(timer);
	// Resetting variables
	clickUp = false;
	clickDown = false;
	clickDrag = false;
	clickAbove = false;
	clickBelow = false;
	return true;
}

// Reads content layer top
function getT(){
	if(ie4)
		contentT = document.all.content.style.pixelTop;
	else if(nn4)
		contentT = document.contentClip.document.content.top;
	else if(dom)
		contentT = parseInt(document.getElementById("content").style.top);
}

// Reads mouse X and Y coordinates
function getMouse(e){
	if(ie4){
		mouseY = event.clientY + document.body.scrollTop;
		mouseX = event.clientX + document.body.scrollLeft;
	}
	else if(nn4 || dom){
		mouseY = e.pageY;
		mouseX = e.pageX;
	}
}

// Moves the layer
function moveTo(){
	if(ie4){
		document.all.content.style.top = contentT;
		document.all.ruler.style.top = dragT;
		document.all.drag.style.top = dragT;
	}
	else if(nn4){
		document.contentClip.document.content.top = contentT;
		document.ruler.top = dragT;
		document.drag.top = dragT;
	}
	else if(dom){
		document.getElementById("content").style.top = contentT + "px";
		document.getElementById("drag").style.top = dragT + "px";
		document.getElementById("ruler").style.top = dragT + "px";
	}
}

// Scrolls up
function scrollUp(){
		getT();
	if(clickAbove){
		if(dragT <= (mouseY-(dragH/2)))
			return up();
	}

	if(clickUp){
		if(contentT < 0){
				dragT = dragT - (speed*scrollLength);
			if(dragT < (rulerT))
					dragT = rulerT;
			contentT = contentT + speed;
			if(contentT > 0)
					contentT = 0;
			moveTo();
			timer = setTimeout("scrollUp()",25);
		}
	}
	return false;
}

// Scrolls down
function scrollDown(){
	getT();

	if(clickBelow){
		if(dragT >= (mouseY-(dragH/2)))
			return up();
	}

	if(clickDown){
		if(contentT > -(contentH - contentClipH)){
			dragT = dragT + (speed*scrollLength);
			if(dragT > (rulerT + scrollH - dragH))
				dragT = (rulerT + scrollH - dragH);
			contentT = contentT - speed;
			if(contentT < -(contentH - contentClipH))
				contentT = -(contentH - contentClipH);
			moveTo();
			timer = setTimeout("scrollDown()",25);
		}
	}
	return false;
}

// reloads page to position the layers again
function reloadPage(){
	location.reload();
}

// shows layer
function showLs(id, par) {
	if (document.layers) {
		if(par!=null){
			par.document.layers[id].visibility = "show"
		} else	document.layers[id].visibility = "show"	
	} else if (document.all) document.all[id].style.visibility = "visible"
	else if(document.getElementById) document.getElementById(id).style.visibility = "visible"
}

function eventLoaderCaller() {
if(ie4){
	// Up-arrow X and Y variables
	upL = document.all.up.style.pixelLeft;
	upT = document.all.up.style.pixelTop;
	// Down-arrow X and Y variables
	downL = document.all.down.style.pixelLeft;
	downT = document.all.down.style.pixelTop;
	// Scrollbar X and Y variables
	dragL = document.all.drag.style.pixelLeft;
	dragT = document.all.drag.style.pixelTop;
	// Ruler Y variable
	rulerT = document.all.ruler.style.pixelTop;
	// Height of content layer and clip layer
	contentH = parseInt(document.all.content.scrollHeight);
	contentClipH = parseInt(document.all.contentClip.style.height);
}
else if(nn4){
	// Up-arrow X and Y variables
	upL = document.up.left;
	upT = document.up.top;
	// Down-arrow X and Y variables
	downL = document.down.left;
	downT = document.down.top;
	// Scrollbar X and Y variables
	dragL = document.drag.left;
	dragT = document.drag.top;
	// Ruler Y variable
	rulerT = document.ruler.top;
	// Height of content layer and clip layer
	contentH = document.contentClip.document.content.clip.bottom;
	contentClipH = document.contentClip.clip.bottom;
	
}
else if(dom){
	// Up-arrow X and Y variables
	upL = parseInt(document.getElementById("up").style.left);
	upT = parseInt(document.getElementById("up").style.top);
	// Down-arrow X and Y variables
	downL = parseInt(document.getElementById("down").style.left);
	downT = parseInt(document.getElementById("down").style.top);
	// Scrollbar X and Y variables
	dragL = parseInt(document.getElementById("drag").style.left);
	dragT = parseInt(document.getElementById("drag").style.top);
	// Ruler Y variable
	rulerT = parseInt(document.getElementById("ruler").style.top);
	// Height of content layer and clip layer
	contentH = parseInt(document.getElementById("content").offsetHeight);
	contentClipH = parseInt(document.getElementById("contentClip").offsetHeight);
	document.getElementById("content").style.top = 0 + "px";
}

if (contentH>=allowedPageHeight) {  
	showLs("up") 
	showLs("down") 
	showLs("drag") 
	showLs("ruler") 
	showLs("scrollBackground")
}
showLs("contentClip")
if(nn4)
	showLs("content", document.layers["contentClip"])
else
	showLs("content")
eventLoader()
}

// preloads the scroller stuff
function eventLoader(){

// Number of pixels scrollbar should move
scrollLength = ((scrollH-dragH)/(contentH-contentClipH));
// Initializes event capturing
if(nn4){
	document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE | Event.MOUSEUP);
	window.onresize = reloadPage;
}
document.onmousedown = down;
document.onmousemove = move;
document.onmouseup = up;
}

// SOME NS4 STUFF HERE
if (nn4) {
document.write('<style type="text/css"><!--');
document.write('#contentClip { z-index:5; }');
document.write('--></style>');
}
else {
document.write('<style type="text/css"><!--');
document.write('#contentClip { z-index:5; overflow:hidden; }');
document.write('--></style>');
}