// x.js
// X v3.9, Cross-Browser DHTML Library from Cross-Browser.com
// Copyright (c) 2002,2003 Michael Foster (mike@cross-browser.com)
// This library is distributed under the terms of the LGPL (gnu.org)

// Variables:
var xVersion='3.9',xOp7=false,xOp5or6=false,xIE4Up=false,xNN4=false,xUA=navigator.userAgent.toLowerCase();
if(window.opera){
	xOp7=(xUA.indexOf('opera 7')!=-1 || xUA.indexOf('opera/7')!=-1);
	if (!xOp7) xOp5or6=(xUA.indexOf('opera 5')!=-1 || xUA.indexOf('opera/5')!=-1 || xUA.indexOf('opera 6')!=-1 || xUA.indexOf('opera/6')!=-1);
}
else if(document.layers) xNN4=true;
else {xIE4Up=document.all && xUA.indexOf('msie')!=-1 && parseInt(navigator.appVersion)>=4;}

// Appearance:
function xShow(e) {
	if(!(e=xGetElementById(e))) return;
	if(e.style && xDef(e.style.visibility)) e.style.visibility='inherit';
	else if(xDef(e.visibility)) e.visibility='show';
}
function xHide(e) {
	if(!(e=xGetElementById(e))) return;
	if(e.style && xDef(e.style.visibility)) e.style.visibility='hidden';
	else if(xDef(e.visibility)) e.visibility='hide';
}
// Position:
function xMoveTo(e,iX,iY) {
	xLeft(e,iX);
	xTop(e,iY);
}
function xLeft(e,iX) {
	if(!(e=xGetElementById(e))) return 0;
	var css=xDef(e.style);
	if (css && xDef(e.style.left) && typeof(e.style.left)=="string") {
		if(arguments.length>1) e.style.left=iX+"px";
		else {
			iX=parseInt(e.style.left);
			if(isNaN(iX)) iX=0;
		}
	}
	else if(css && xDef(e.style.pixelLeft)) {
		if(arguments.length>1) e.style.pixelLeft=iX;
		else iX=e.style.pixelLeft;
	}
	else if(xDef(e.left)) {
		if(arguments.length>1) e.left=iX;
		else iX=e.left;
	}
	return iX;
}
function xTop(e,iY) {
	if(!(e=xGetElementById(e))) return 0;
	var css=xDef(e.style);
	if(css && xDef(e.style.top) && typeof(e.style.top)=="string") {
		if(arguments.length>1) e.style.top=iY+"px";
		else {
			iY=parseInt(e.style.top);
			if(isNaN(iY)) iY=0;
		}
	}
	else if(css && xDef(e.style.pixelTop)) {
		if(arguments.length>1) e.style.pixelTop=iY;
		else iY=e.style.pixelTop;
	}
	else if(xDef(e.top)) {
		if(arguments.length>1) e.top=iY;
		else iY=e.top;
	}
	return iY;
}
function xPageX(e) {
  if (!(e=xGetElementById(e))) return 0;
  if (xDef(e.pageX)) return e.pageX;
  var x = 0;
  while (e) {
    if (xDef(e.offsetLeft)) x += e.offsetLeft;
    e = xParent(e);
  }
  return x;
}
function xPageY(e) {
  if (!(e=xGetElementById(e))) return 0;
  if (xDef(e.pageY)) return e.pageY;
  var y = 0;
  while (e) {
    if (xDef(e.offsetTop)) y += e.offsetTop;
    e = xParent(e);
  }
  return y;
}


// Event:
function xAddEventListener(e,eventType,eventListener,useCapture) {
  if(!(e=xGetElementById(e))) return;
  eventType=eventType.toLowerCase();
  if((!xIE4Up && !xOp7) && e==window) {
    if(eventType=='resize') { window.xPCW=xClientWidth(); window.xPCH=xClientHeight(); window.xREL=eventListener; xResizeEvent(); return; }
    if(eventType=='scroll') { window.xPSL=xScrollLeft(); window.xPST=xScrollTop(); window.xSEL=eventListener; xScrollEvent(); return; }
  }
  var eh="e.on"+eventType+"=eventListener";
  if(e.addEventListener) e.addEventListener(eventType,eventListener,useCapture);
  else if(e.attachEvent) e.attachEvent("on"+eventType,eventListener);
  else if(e.captureEvents) {
    if(useCapture||(eventType.indexOf('mousemove')!=-1)) { e.captureEvents(eval("Event."+eventType.toUpperCase())); }
    eval(eh);
  }
  else eval(eh);
}
function xRemoveEventListener(e,eventType,eventListener,useCapture) {
  if(!(e=xGetElementById(e))) return;
  eventType=eventType.toLowerCase();
  if((!xIE4Up && !xOp7) && e==window) {
    if(eventType=='resize') { window.xREL=null; return; }
    if(eventType=='scroll') { window.xSEL=null; return; }
  }
  var eh="e.on"+eventType+"=null";
  if(e.removeEventListener) e.removeEventListener(eventType,eventListener,useCapture);
  else if(e.detachEvent) e.detachEvent("on"+eventType,eventListener);
  else if(e.releaseEvents) {
    if(useCapture||(eventType.indexOf('mousemove')!=-1)) { e.releaseEvents(eval("Event."+eventType.toUpperCase())); }
    eval(eh);
  }
  else eval(eh);
}
function xEvent(evt) { // cross-browser event object prototype
  this.type = "";
  this.target = null;
  this.pageX = 0;
  this.pageY = 0;
  this.offsetX = 0;
  this.offsetY = 0;
  this.keyCode = 0;
  var e = evt ? evt : window.event;
  if(!e) return;
  // type
  if(e.type) this.type = e.type;
  // target
  if(xNN4) this.target = xLayerFromPoint(e.pageX, e.pageY);
  else if(e.target) this.target = e.target;
  else if(e.srcElement) this.target = e.srcElement;
  // pageX, pageY
  if(xOp5or6) { this.pageX = e.clientX; this.pageY = e.clientY; }
  else if(xDef(e.pageX,e.pageY)) { this.pageX = e.pageX; this.pageY = e.pageY; }
  else if(xDef(e.clientX,e.clientY)) { this.pageX = e.clientX + xScrollLeft(); this.pageY = e.clientY + xScrollTop(); }
  // offsetX, offsetY
  if(xDef(e.layerX,e.layerY)) { this.offsetX = e.layerX; this.offsetY = e.layerY; }
  else if(xDef(e.offsetX,e.offsetY)) { this.offsetX = e.offsetX; this.offsetY = e.offsetY; }
  else { this.offsetX = this.pageX - xPageX(this.target); this.offsetY = this.pageY - xPageY(this.target); }
  // keycode
  if (xDef(e.keyCode)) { this.keyCode = e.keyCode; }
  else if (xDef(e.which)) { this.keyCode = e.which; }
}
function xResizeEvent() { // window resize event simulation
  setTimeout("xResizeEvent()", 250);
  var cw = xClientWidth(), ch = xClientHeight();
  if (window.xPCW != cw || window.xPCH != ch) { window.xPCW = cw; window.xPCH = ch; window.xREL(); }
}
function xScrollEvent() { // window scroll event simulation
  setTimeout("xScrollEvent()", 250);
  var sl = xScrollLeft(), st = xScrollTop();
  if (window.xPSL != sl || window.xPST != st) { window.xPSL = sl; window.xPST = st; window.xSEL(); }
}

// Object:
function xGetElementById(e) {
  if(typeof(e)!="string") return e;
  if(document.getElementById) e=document.getElementById(e);
  else if(document.all) e=document.all[e];
  else if(document.layers) e=xLayer(e);
  else e=null;
  return e;
}
function xLayer(id,root) { // only for nn4
  var i,layer,found=null;
  if (!root) root=window;
  for(i=0; i<root.document.layers.length; i++) {
    layer=root.document.layers[i];
    if(layer.id==id) return layer;
    if(layer.document.layers.length) found=xLayer(id,layer);
    if(found) return found;
  }
  return null;
}
function xLayerFromPoint(x,y,root) { // only for nn4
  var i, hn=null, hz=-1, cn;
  if (!root) root = window;
  for (i=0; i < root.document.layers.length; ++i) {
    cn = root.document.layers[i];
    if (cn.visibility != "hide" && x >= cn.pageX && x <= cn.pageX + cn.clip.right && y >= cn.pageY && y <= cn.pageY + cn.clip.bottom ) {
      if (cn.zIndex > hz) { hz = cn.zIndex; hn = cn; }
    }
  }
  if (hn) {
    cn = xLayerFromPoint(x,y,hn);
    if (cn) hn = cn;
  }
  return hn;
}
function xParent(e){
  if (!(e=xGetElementById(e))) return null;
  var p=null;
  if (e.parentLayer){if (e.parentLayer!=window) p=e.parentLayer;}
  else{
    if (e.offsetParent) p=e.offsetParent;
    else if (e.parentNode) p=e.parentNode;
    else if (e.parentElement) p=e.parentElement;
  }
  return p;
}
function xDef() {
  for(var i=0; i<arguments.length; ++i){if(typeof(arguments[i])=="" || typeof(arguments[i])=="undefined") return false;}
  return true;
}


// end x.js