/*
		dw_core.js
		version date: July 2002
				
		This code is from Dynamic Web Coding 
    at http://www.dyn-web.com/
    Copyright 2002 by Sharon Paine 
    See Terms of Use at http://www.dyn-web.com/bus/terms.html
    Permission granted to use this code 
    as long as this entire notice is included.
*/

function dynObj(id,x,y,w,h) {
	this.el = (document.getElementById)? document.getElementById(id): (document.all)? document.all[id]: (document.layers)? getLyrRef(id,document): null;
	if (!this.el) return null;
	this.doc = (document.layers)? this.el.document: this.el;
	this.css = (this.el.style)? this.el.style: this.el;
	var px = (document.layers||window.opera)? "": "px";
	this.x = x || 0;	if (x) this.css.left = this.x+px;
	this.y = y || 0;	if (y) this.css.top = this.y+px;
	this.width = w? w: (this.el.offsetWidth)? this.el.offsetWidth: (this.css.clip.width)? this.css.clip.width: 0;
	this.height = h? h: (this.el.offsetHeight)? this.el.offsetHeight: (this.css.clip.height)? this.css.clip.height: 0;
	// if w/h passed, set style width/height
	if (w){ (document.layers)? this.css.clip.width=w+px: this.css.width=w+px;}
	if (h){ (document.layers)? this.css.clip.height=h+px: this.css.height=h+px;}
	this.obj = id + "dynObj"; 	eval(this.obj + "=this");
}

function dw_show() { this.css.visibility = "visible"; }
function dw_hide() { this.css.visibility = "hidden"; }

function dw_shiftTo(x,y) {
	if (x!=null) this.x=x; if (y!=null) this.y=y;	
	// rounded below (this.x/y can hold decimals)
	if (this.css.moveTo) { 
		this.css.moveTo(Math.round(this.x),Math.round(this.y)); 
	} else { 
		this.css.left=Math.round(this.x)+"px"; 
		this.css.top=Math.round(this.y)+"px"; 
	}
}

function dw_shiftBy(x,y) {
	this.shiftTo(this.x+x,this.y+y);
}

function dw_writeLyr(cntnt) {
	if (typeof this.doc.innerHTML!="undefined") {
      this.doc.innerHTML = cntnt;
  } else if (document.layers) {
			this.doc.write(cntnt);
			this.doc.close();
  }
}

function dw_setBgClr(bg) {
	if (document.layers) this.doc.bgColor=bg;
	else this.css.backgroundColor=bg;
}

// assign methods 
dynObj.prototype.show = dw_show;
dynObj.prototype.hide = dw_hide;
dynObj.prototype.shiftTo = dw_shiftTo;
dynObj.prototype.shiftBy = dw_shiftBy;
dynObj.prototype.writeLyr = dw_writeLyr;
dynObj.prototype.setBgClr=dw_setBgClr;


// get reference to nested layer for ns4
// from dhtmllib.js by Mike Hall of www.brainjar.com
function getLyrRef(lyr,doc) {
	if (document.layers) {
		var theLyr;
		for (var i=0; i<doc.layers.length; i++) {
	  	theLyr = doc.layers[i];
			if (theLyr.name == lyr) return theLyr;
			else if (theLyr.document.layers.length > 0) 
	    	if ((theLyr = getLyrRef(lyr,theLyr.document)) != null)
					return theLyr;
	  }
		return null;
  }
}

/*  
		dw_scroll.js
		requires dw_core.js
		last revised: March 2003 
		
*/

var scrTimer = 20; // interval between calls to scroll onmouseover

function stopScroll(num) {
  if (pgLoaded && wndo[num]) {
  	clearTimeout(wndo[num].scrTmId);
  	wndo[num].scrTmId = 0;
  }
}

function loadScrLyr(num,lyr,id) {
	if (!pgLoaded) return; // avoid not loaded errors
	if (typeof wndo[num].cnt != "undefined") wndo[num].cnt.hide();
  wndo[num].scrTmId = 0;
	wndo[num].cnt = new dynObj(lyr);
  // mainly for ns6+/mozilla when scrolling horizontally
  if (id && document.getElementById) 
    wndo[num].cnt.width = document.getElementById(id).offsetWidth;
	wndo[num].cnt.show();
	wndo[num].cnt.shiftTo(0,0);	// restore top/left to 0 
	wndo[num].maxX = wndo[num].cnt.width - wndo[num].width;
	wndo[num].maxY = wndo[num].cnt.height - wndo[num].height
} 

// These functions are for onmouseover scrolling
function inchDown(num,inc) {
	if (!pgLoaded||!wndo[num]) return;
	if (wndo[num].scrTmId) clearTimeout(wndo[num].scrTmId);
	var y = parseInt(wndo[num].cnt.css.top);
	if (y>-wndo[num].maxY) { 
    if ((y-inc)>(-wndo[num].maxY)) wndo[num].cnt.shiftBy(0,-inc);
		else wndo[num].cnt.shiftBy(0,-(wndo[num].maxY-Math.abs(y)));
		wndo[num].scrTmId = setTimeout("inchDown("+num+","+inc+")",scrTimer);	
	}
}

function inchUp(num,inc) {
	if (!pgLoaded||!wndo[num]) return;
	if (wndo[num].scrTmId) clearTimeout(wndo[num].scrTmId);
	var y = parseInt(wndo[num].cnt.css.top);
	if (y<0) { 
    if ((y+inc)<=0) wndo[num].cnt.shiftBy(0,inc); 
		else wndo[num].cnt.shiftBy(0,-y);
		wndo[num].scrTmId = setTimeout("inchUp("+num+","+inc+")",scrTimer);	
  }
}

function inchRight(num,inc) {
	if (!pgLoaded||!wndo[num]) return;
	if (wndo[num].scrTmId) clearTimeout(wndo[num].scrTmId);
	var x = parseInt(wndo[num].cnt.css.left);	
	if (x>-wndo[num].maxX) { 
    if ((x-inc)>(-wndo[num].maxX)) wndo[num].cnt.shiftBy(-inc,0);
		else wndo[num].cnt.shiftBy(-(wndo[num].maxX-Math.abs(x)),0);
		wndo[num].scrTmId = setTimeout("inchRight("+num+","+inc+")",scrTimer);	
	}
}

function inchLeft(num,inc) {
	if (!pgLoaded||!wndo[num]) return;
	if (wndo[num].scrTmId) clearTimeout(wndo[num].scrTmId);
	var x = parseInt(wndo[num].cnt.css.left);
	if (x<0) { 
    if ((x+inc)<=0) wndo[num].cnt.shiftBy(inc,0); 
		else wndo[num].cnt.shiftBy(-x,0); 
		wndo[num].scrTmId = setTimeout("inchLeft("+num+","+inc+")",scrTimer);	
  }
}

/*  
  html part
*/
// resize fix for ns4
var origWidth, origHeight;
if (document.layers) {
	origWidth = window.innerWidth; origHeight = window.innerHeight;
	window.onresize = function() { if (window.innerWidth != origWidth || window.innerHeight != origHeight) history.go(0); }
}

var pgLoaded = false;
var wndo = new Array();	// "window(s)" for scrollable content
function initScrLyr() {
	pgLoaded=true;	
	// creat scrollable content area
	// arg: id of div containing scrollable div(s)
	wndo[0] = new dynObj('wn');	
	// load scrolling content
	// arg's: array number of wndo, id of scroll div
	loadScrLyr(0,'lyr1');	
}

window.onload = initScrLyr;