/* core, clip, utility combined into one js */

/*
		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.
*/

/////////////////////////////////////////////////////////////////////
//  dynObj constructor
//		arguments: id (required): id of positioned div.
//		left,top,width,height optional arguments.
/////////////////////////////////////////////////////////////////////
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_clip.js - clip methods for use with dw_core.js
		developed from study of code from dynduo, brainjar and bratta
		i.e., http://www.dansteinman.com/dynduo/
		http://www.brainjar.com/ and http://www.dhtmlcentral.com/
		
		This code is from Dynamic Web Coding 
    at http://www.dyn-web.com/
    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.
*/

dynObj.prototype.getClipValues = function() {
  if (typeof this.css.clip != "undefined") {
    var clipVal = new Array();
    if (typeof this.css.clip.top != "undefined") {
  		clipVal[0] = this.css.clip.top;
  		clipVal[1] = this.css.clip.right;
  		clipVal[2] = this.css.clip.bottom;
  		clipVal[3] = this.css.clip.left;
  	} else {
  		clipVal = this.css.clip.slice(5,-1).split(' ');
  			for (var i=0; i<4; i++) {
  				clipVal[i] = parseInt(clipVal[i]);
  			}
    } 
    return clipVal;
  } 
  else return false;
}

dynObj.prototype.clipBy = function(top,rt,btm,lft) {
	if (typeof this.css.clip != "undefined") {
    if (typeof this.css.clip.top != "undefined") {
    	this.css.clip.top += top;
  		this.css.clip.right += rt;
  		this.css.clip.bottom += btm;
  		this.css.clip.left += lft;
    } else {
      var clipVal = this.getClipValues();
    	this.css.clip = "rect(" + Number(clipVal[0]+top) + "px, " + Number(clipVal[1]+rt)  + "px, " + Number(clipVal[2]+btm) + "px, " + Number(clipVal[3]+lft) + "px)";
    } 
  }
}

dynObj.prototype.clipTo = function(top,rt,btm,lft) {
	 if (typeof this.css.clip != "undefined") {
    if (typeof this.css.clip.top != "undefined") {
    	this.css.clip.top = top;
  		this.css.clip.right = rt;
  		this.css.clip.bottom = btm;
  		this.css.clip.left = lft;
    } else {
      this.css.clip = "rect("+top+"px, "+rt+"px, "+btm+"px, "+lft+"px)";
    }
  }
}

/*
		dw_util.js
		utility functions (and 1 method for dynObj)
		version date: August 2002
		
		functions for getting window dimensions and scroll amount
		from http://13thparallel.com/?issue=2002.06&title=viewport
				
		This code is from Dynamic Web Coding 
    www.dyn-web.com 
    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.		
*/

// center in container (window or outer layer)
// NOTE: uses this.width/height properties of dynObj
// so make sure those have been obtained/set appropriately
// for type of content!!!!
dynObj.prototype.centerIn = function(outer) {
	var outWd, outHt, inWd, inHt, x, y;
	if (eval(outer)==window) {
		outWd=getWinWidth();
		outHt=getWinHeight();
	} else {
		outWd=outer.width;
		outHt=outer.height;
	}
	inWd=this.width;
	inHt=this.height;
	x=Math.round((outWd-inWd)/2);
	y=Math.round((outHt-inHt)/2);
	this.shiftTo(x,y);
}

// gets rendered height/width 
// for ns4, pass reference to layer. 
// for others, pass reference to layer or
// id of html element containing content (depends...)
function getWidth(obj,id) {
	var wd=0;
	if (document.getElementById||document.all) {
		var elem;
		if (id)	elem = (document.getElementById)? document.getElementById(id): document.all[id];
		else elem = obj;
		if (elem.offsetWidth) wd = elem.offsetWidth;
  } else if (obj.document) wd = obj.document.width;	// ns4
	return wd;
}

function getHeight(obj,id) {
	var ht=0;
	if (document.getElementById||document.all) {
    var elem;
		if (id)	elem = (document.getElementById)? document.getElementById(id): document.all[id];
		else elem = obj;
		if (elem.offsetHeight) ht = elem.offsetHeight;
  } else if (obj.document) ht = obj.document.height;	// ns4
	return ht;
}

// credit to http://www.13thparallel.com for the following 4 functions
// see http://13thparallel.com/?issue=2002.06&title=viewport
// returns width of window
function getWinWidth() {
	var winWd = 0;
	if (document.documentElement && document.documentElement.clientWidth) 
		winWd = document.documentElement.clientWidth;
	else if (document.body && document.body.clientWidth) 
		winWd = document.body.clientWidth;
	else if (document.body && document.body.offsetWidth) 
		winWd = document.body.offsetWidth; // ns6
	else if (window.innerWidth) winWd = window.innerWidth-18;
	return winWd;
}

// returns height of window
function getWinHeight() {
	var winHt = 0;
	if (window.innerHeight) winHt = window.innerHeight-18;
	else if (document.documentElement && document.documentElement.clientHeight) 
		winHt = document.documentElement.clientHeight;
	else if (document.body && document.body.clientHeight) 
		winHt = document.body.clientHeight;
	return winHt;
}	

// returns amount of vertical scroll
function getScrollY() {
	var scroll_y = 0;
	if (document.documentElement && document.documentElement.scrollTop)
		scroll_y = document.documentElement.scrollTop;
	else if (document.body && document.body.scrollTop) 
		scroll_y = document.body.scrollTop; 
	else if (window.pageYOffset)
		scroll_y = window.pageYOffset;
	else if (window.scrollY)
		scroll_y = window.scrollY;
	return scroll_y;
}

// returns amount of horizontal scroll
function getScrollX() {
	var scroll_x = 0;
	if (document.documentElement && document.documentElement.scrollLeft)
		scroll_x = document.documentElement.scrollLeft;
	else if (document.body && document.body.scrollLeft) 
		scroll_x = document.body.scrollLeft; 
	else if (window.pageXOffset)
		scroll_x = window.pageXOffset;
	else if (window.scrollX)
		scroll_x = window.scrollX;
	return scroll_x;
}