
<!--
	//dw_lib.js - used with dw_glide.js, dw_glider.js, ...

	dynObj.holder = {};
	// constructor
	function dynObj(id,x,y,w,h) {
	  var el = dynObj.getElemRef(id);
	  if (!el) return;  this.id = id;
	  dynObj.holder[this.id] = this; this.animString = "dynObj.holder." + this.id;
	  var px = window.opera? 0: "px";
		this.x = x || 0;	if (x) el.style.left = this.x + px;
		this.y = y || 0;	if (y) el.style.top = this.y + px;
		this.w = w || el.offsetWidth || 0;	this.h = h || el.offsetHeight || 0;
		// if w/h passed, set style width/height
		if (w) el.style.width = w + px; if (h) el.style.height = h + px;
	}

	dynObj.getElemRef = function(id) {
	  var el = document.getElementById? document.getElementById(id): null;
	  return el;
	}

	dynObj.getInstance = function(id) {
	  var obj = dynObj.holder[id];
	  if (!obj) obj = new dynObj(id);
	  else if (!obj.el) obj.el = dynObj.getElemRef(id);
	  return obj;
	}

	dynObj.prototype.shiftTo = function(x,y) {
	  var el = this.el? this.el: dynObj.getElemRef(this.id)? dynObj.getElemRef(this.id): null;
	  if (el) {
		if (x != null) el.style.left = (this.x = x) + "px";
		if (y != null) el.style.top = (this.y = y) + "px";
	  }
	}

	dynObj.prototype.shiftBy = function(x,y) { this.shiftTo(this.x+x, this.y+y); }

	dynObj.prototype.show = function() {
	  var el = this.el? this.el: dynObj.getElemRef(this.id)? dynObj.getElemRef(this.id): null;
	  if (el) el.style.visibility = "visible";
	}
	dynObj.prototype.hide = function() {
	  var el = this.el? this.el: dynObj.getElemRef(this.id)? dynObj.getElemRef(this.id): null;
	  if (el) el.style.visibility = "hidden";
	}


	// for time-based animations
	// resources: www.13thparallel.org and www.youngpup.net (accelimation)
	var dw_Bezier = {
	  B1: function (t) { return t*t*t },
	  B2: function (t) { return 3*t*t*(1-t) },
	  B3: function (t) { return 3*t*(1-t)*(1-t) },
	  B4: function (t) { return (1-t)*(1-t)*(1-t) },
	  // returns current value based on percentage of time passed
	  getValue: function (percent,startVal,endVal,c1,c2) {
		return endVal * this.B1(percent) + c2 * this.B2(percent) + c1 * this.B3(percent) + startVal * this.B4(percent);
	  }
	}

	// adapted from accelimation.js by Aaron Boodman of www.youngpup.net
	dw_Animation = {
	  instances: [],
	  add: function(fp) {
		this.instances[this.instances.length] = fp;
		if (this.instances.length == 1) this.timerID = window.setInterval("dw_Animation.control()", 10);
	  },

	  remove: function(fp) {
		for (var i = 0; this.instances[i]; i++) {
			if (fp == this.instances[i]) {
				this.instances = this.instances.slice(0,i).concat( this.instances.slice(i+1) );
				break;
			}
		}
		if (this.instances.length == 0) {
			window.clearInterval(this.timerID);	this.timerID = null;
		}
	  },

	  control: function() {
		for (var i = 0; this.instances[i]; i++) {
			if (typeof this.instances[i] == "function" ) this.instances[i]();
		  else eval(this.instances[i]);
		}
	  }
	}
//-->