Inheritance through Prototypes: The Animation Library Code - www.docjavascript.com

The Code for the Animation Library

var NS4 = (document.layers) ? 1 : 0;
var IE4 = (document.all) ? 1 : 0;
if (NS4) onload = init;
function init() {
  setTimeout("onresize = redo", 1000);
}
function redo() {
  location.reload();
}
function animation_toolbox() {
  this.show = show;
  this.hide = hide;
  this.left = left;
  this.top = top;
  this.moveTo = moveTo;
  this.slideBy = slideBy;
  this.lineSlide = lineSlide;
  this.slideTo = slideTo;
  this.circle = circle;
  this.circleSlide = circleSlide;
}
function animation_simple(id) {
  this.element = (NS4) ? document[id] : document.all[id].style;
  this.active = 0;
  this.timer = null;
  this.name = id + "Var";
  eval(this.name + " = this"); 
}
function animation_nested() {
  var args = animation_nested.arguments;
  if (NS4) {
    this.element = window; // the window object
    for (var i = 0; i  0)
        eval(shift(ar));
    }
    return;
  }
  this.timer = setTimeout(this.name + ".lineSlide(" + 
    num + ", " + fx + ", " + fy + ", " + tx + ", " + 
    ty + ", " + sx + ", " + sy + ", " + interval + ")", 
    interval);
}
function getAngle(angle) {
  var small = angle % 360;
  if (small  0)
        eval(shift(ar));
    }
    return;
  }
  this.timer = setTimeout(this.name + ".circleSlide(" + 
    cx + ", " + cy + ", " + radius + ", " + angle0 + ", " + 
    angle1 + ", " + increment + ", " + interval + ")", interval);