/**********************************************************************************  
PageScroll 
*  Copyright (C) 2001 Thomas Brattli
*  This script was released at DHTMLCentral.com
*  Visit for more great scripts!
*  This may be used and changed freely as long as this msg is intact!
*  We will also appreciate any links you could give us.
*
*  Made by Thomas Brattli
*
*  Script date: 09/23/2001 (keep this date to check versions) 
*********************************************************************************/
function lib_bwcheck(){ //Browsercheck (needed)
    this.ver=navigator.appVersion
    this.agent=navigator.userAgent
    this.dom=document.getElementById?1:0
    this.opera5=(navigator.userAgent.indexOf("Opera")>-1 && document.getElementById)?1:0
    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0; 
    this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0;
    this.ie4=(document.all && !this.dom && !this.opera5)?1:0;
    this.ie=this.ie4||this.ie5||this.ie6
    this.mac=this.agent.indexOf("Mac")>-1
    this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
    this.ns4=(document.layers && !this.dom)?1:0;
    this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5)
    return this
}
var bw=lib_bwcheck()
/*********************************************************************************
These are the variables you have to set:
*********************************************************************************/

//The speed of the timeout between each scroll.
timSpeed = 50

//The height of the container (change this when it scrolls to much or to little)
contHeight = 100

/*********************************************************************************
This is the object constructor function, which applies 
methods and properties to the Cross-browser layer object
*********************************************************************************/
function makeScrollObj(obj,nest){
    nest=(!nest) ? "":'document.'+nest+'.'        
    this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0;
      this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+'document.'+obj):0;  
      
    this.height=bw.ns4?this.css.document.height:this.el.offsetHeight
    this.top=b_gettop                                        
    return this
}

// A unit of measure that will be added when setting the position of a layer.
var px = bw.ns4||window.opera?"":"px";

//Getting the top for the top method
function b_gettop(){
    var gleft=(bw.ns4 || bw.ns6)?parseInt(this.css.top):eval(this.css.pixelTop);
    return gleft;
}
//Variables
var scrollTim = 1;
var active = 0;
/*********************************************************************************
The scroll function. Checks what way to scroll and checks if the
layer is not already on top or bottom.
*********************************************************************************/
function scroll(speed){
    clearTimeout(scrollTim)
    way = speed>0?1:0
    if ((!way && oScroll[active].top()>-oScroll[active].height+contHeight) || (oScroll[active].top()<0 && way)){
        oScroll[active].css.top = (oScroll[active].top()+speed)+px
        scrollTim = setTimeout("scroll("+speed+")",timSpeed)
    }
}
//Clears the timeout so the scroll stops, this is called onmouseout.
function noScroll(){
    clearTimeout(scrollTim)
}
/*********************************************************************************
Changes the active layer. Hides the one that's visible and
shows the "new" one. Also set's the new layers top to
0 so it starts at top.
*********************************************************************************/
function changeActive(num){
    oScroll[active].css.visibility = "hidden"
    active = num
    oScroll[active].css.top = 0+px
    oScroll[active].css.visibility = "visible"
}
/*********************************************************************************
Initilizes the page, makes a oScroll Array and calls the object constructor.
Here you can add as many scrollObjects as you want
*********************************************************************************/
function scrollInit(){
    oScroll = new Array()
    
    // You can add and remove scrollObjects here.
    oScroll[0] = new makeScrollObj('divScroll1','divCont')
    
    oScroll[0].css.left = 0+px
    oScroll[0].css.top = 0+px
    oScroll[0].css.visibility = "visible"
    /*oControl = new makeScrollObj('divControl')
    oControl.css.visibility = "visible"*/
}
/*********************************************************************************
Executes the scrollInit function on pageload.
*********************************************************************************/
onload = scrollInit;

/***************
Multiple Scripts
If you have two or more scripts that use the onload event, probably only one will run (the last one).
Here is a solution for starting multiple scripts onload:
  1. Delete or comment out all the onload assignments, onload=initScroll and things like that.
  2. Put the onload assignments in the body tag like in this example, note that they must have braces ().
  Example: <body onload="initScroll(); initTooltips(); initMenu();">
**************/