if ('undefined' == typeof this.pageYOffset) {
var d = (document.compatMode == 'CSS1Compat') ? 'documentElement' : 'body';
this.pageXOffset = function () { return document[d].scrollLeft; }
this.pageYOffset = function () { return document[d].scrollTop ; }
}

if ('undefined' == typeof this.addEventListener) {
this.addEventListener = new Function ('type', 'handler', 'capture', this.attachEvent ? "return this.attachEvent ('on' + type, handler);" : "this['on' + type] = function (oldHandler) { return function (e) { oldHandler && oldHandler (e); handler (e); } } (this['on' + type]);");
}

addEventListener ('load', function () {

function Timer (msec, handler) {
this.handler = handler;
this.timeOut = msec || 100;
this.timerID = null;
}

function Scheduler (handler) {
this.timerID = function (thisObj, callBack) { return setTimeout (function() { thisObj.handler (); callBack.call (thisObj); }, thisObj.timeOut); } (this, arguments.callee);
}

function Wrapper (node) {
this.target = node;
}

function Coordinater (dx, dy) {
var curX = parseInt (this.left) + dx;
var curY = parseInt (this.top) + dy;
this.left = (curX > 0 ? curX : 0) + 'px';
this.top = (curY > 0 ? curY : 0) + 'px';
}

function Escalator (delay) { /*@cc_on@*/
this.scrollDelay = delay;
this.scrollX = pageXOffset /*@if (@_jscript) () @end@*/;
this.scrollY = pageYOffset /*@if (@_jscript) () @end@*/;
}

function Synchronizer (output) { /*@cc_on@*/
var dx = Accelerater.call (this, pageXOffset /*@if (@_jscript) () @end@*/ - this.scrollX);
var dy = Accelerater.call (this, pageYOffset /*@if (@_jscript) () @end@*/ - this.scrollY);
this.scrollX += dx;
this.scrollY += dy;
output.call (this, dx, dy);
}

function Accelerater (dv) {
return (dv) ? Math.round (dv / Math.abs (dv) * (Math.abs (dv) / this.scrollDelay)) : 0;
}

function Initializer () {
this.style.position = 'absolute';
if (isNaN (parseInt (this.style.left))) this.style.left = this.offsetLeft + 'px';
if (isNaN (parseInt (this.style.top ))) this.style.top = this.offsetTop + 'px';
}

Escalator.prototype.init = function () {
return Initializer.apply (this.target, arguments);
}

Escalator.prototype.start = function () {
return Scheduler.apply (this, arguments);
}

Escalator.prototype.print = function () {
return Coordinater.apply (this.target.style, arguments);
}

Escalator.prototype.sync = function () {
return Synchronizer.call (this, function (dx, dy) { this.print (dx, dy); } );
}

Escalator.create = function (node, delay, msec) {
var e = new this (delay || 10);
Wrapper.call (e, node);
Timer.call (e, msec || 10, function () { e.sync (); } );
e.init ();
e.print (e.scrollX, e.scrollY);
e.start ();
return e;
}

Escalator.createById = function (id, delay, msec) {
var node = document.getElementById && document.getElementById(id);
return node ? this.create (node, delay, msec) : node;
}

Escalator.createById ('page-top');
Escalator.createById ('abstract');

}, false);

myOP = window.opera;           
myN6 = document.getElementById; 
myIE = document.all; 
myN4 = document.layers; 
if      (myOP) myBR="N6"; 
else if (myIE) myBR="I4"; 
else if (myN6) myBR="N6"; 
else if (myN4) myBR="N4"; 
else           myBR=""; 

function myBrowserObj(myID){ 
  if (myBR=="N6") myRet=document.getElementById(myID).style;
  else if (myBR=="I4") myRet=document.getElementById(myID).style;
  else if (myBR=="N4") myRet=document[myID];
  else myRet=0;
  return myRet;
}
function myDisp(myID,myVisibility){ 
  myObj = myBrowserObj(myID); 
  if(myObj){ 
    myObj.visibility = myVisibility; 
  }
  return true;
}
function myIn( myID ) { 
  myDisp(myID,"visible"); 
}
function myOut( myID ) { 
  myDisp(myID,"hidden"); 
}