// JavaScript Document
var upH = 17; 
var upW = 15; 
var downH = 17; 
var downW = 15; 
var dragH = 27; 
var dragW = 17; 
var scrollH = 90; 
var speed =15; 
var dom = document.getElementById ? true:false;
var nn4 = document.layers ? true:false;
var ie4 = document.all ? true:false;
var mouseY;
var mouseX; 
var clickUp = false; 
var clickDown = false; 
var clickDrag = false; 
var clickAbove = false; 
var clickBelow = false; 

var timer = setTimeout("",500); 
var upL; 
var upT; 
var downL; 
var downT; 
var dragL; 
var dragT; 
var rulerL; 
var rulerT; 
var contentT; 
var contentH; 
var contentClipH; 
var scrollLength; 
var startY; 


function down(e){
if((document.layers && e.which!=1) || (document.all && event.button!=1)) return true; // Enables the right mousebutton 
getMouse(e);
startY = (mouseY - dragT);


if(mouseX >= upL && (mouseX <= (upL + upW)) && mouseY >= upT && (mouseY <= (upT + upH))){
clickUp = true;
return scrollUp();
} 

else if(mouseX >= downL && (mouseX <= (downL + downW)) && mouseY >= downT && (mouseY <= (downT + downH))){
clickDown = true;
return scrollDown();
}

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(mouseY < dragT){
clickAbove = true;
clickUp = true;
return scrollUp();
}

else{
clickBelow = true;
clickDown = true;
return scrollDown();
}
}

else{
return true;
}
}


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();
}

if(ie4)
return false;
}

function up(){
clearTimeout(timer);

clickUp = false;
clickDown = false;
clickDrag = false;
clickAbove = false;
clickBelow = false;
return true;
}


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);
}


function getMouse(e){
if(ie4){
mouseY = event.clientY;
mouseX = event.clientX;
}
else if(nn4 || dom){
mouseY = e.pageY;
mouseX = e.pageX;
}
}


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";
}
}


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;
}


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;
}


function reloadPage(){
location.reload();
}


function eventLoader(){
if(ie4){

upL = document.all.up.style.pixelLeft;
upT = document.all.up.style.pixelTop; 

downL = document.all.down.style.pixelLeft;
downT = document.all.down.style.pixelTop;

dragL = document.all.drag.style.pixelLeft;
dragT = document.all.drag.style.pixelTop; 

rulerT = document.all.ruler.style.pixelTop; 

contentH = document.all.content.offsetHeight;
contentClipH = document.all.contentClip.offsetHeight;
}
else if(nn4){

upL = document.up.left;
upT = document.up.top; 

downL = document.down.left;
downT = document.down.top; 

dragL = document.drag.left;
dragT = document.drag.top; 

rulerT = document.ruler.top;

contentH = document.contentClip.document.content.clip.bottom;
contentClipH = document.contentClip.clip.bottom;
}
else if(dom){

upL = parseInt(document.getElementById("up").style.left);
upT = parseInt(document.getElementById("up").style.top);

downL = parseInt(document.getElementById("down").style.left);
downT = parseInt(document.getElementById("down").style.top);

dragL = parseInt(document.getElementById("drag").style.left);
dragT = parseInt(document.getElementById("drag").style.top);

rulerT = parseInt(document.getElementById("ruler").style.top);

contentH = document.getElementById("content").offsetHeight;
contentClipH = document.getElementById("contentClip").offsetHeight;
document.getElementById("content").style.top = 0 + "px";

}

scrollLength = ((scrollH-dragH)/(contentH-contentClipH));

if(nn4){
document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE | Event.MOUSEUP)
window.onresize = reloadPage;
}
document.onmousedown = down;
document.onmousemove = move;
document.onmouseup = up;
}