// JavaScript Document


function handleError() {
	return true;
}

window.onerror = handleError;


function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		NavigationButtons_PrevArrow_down = newImage("../../images/navigation/NavigationButtons_PrevAr-02.gif");
		NavigationButtons_PrevArrow_over = newImage("../../images/navigation/NavigationButtons_PrevAr-03.gif");
		NavigationButtons_NextArrow_over = newImage("../../images/navigation/NavigationButtons_NextAr-06.gif");
		NavigationButtons_NextArrow_down = newImage("../../images/navigation/NavigationButtons_NextAr-07.gif");
		chapter_Prev_01_over = newImage("../../images/chapter_Prev_01-over.gif");
		chapter_Prev_01_down = newImage("../../images/chapter_Prev_01-down.gif");
		chapter_Next_01_over = newImage("../../images/navigation/chapter_Next_01-over.gif");
		chapter_Next_01_down = newImage("../../images/navigation/chapter_Next_01-down.gif");
		preloadFlag = true;
	}
}

var DHTML = (document.getElementById || document.all || document.layers);

function getObj(name)
{
  if (document.getElementById)
  {
  	this.obj = document.getElementById(name);
	this.style = document.getElementById(name).style;
  }
  else if (document.all)
  {
	this.obj = document.all[name];
	this.style = document.all[name].style;
  }
  else if (document.layers)
  {
   	this.obj = document.layers[name];
   	this.style = document.layers[name];
  }
}

function invi(flag, name)
{
	if (!DHTML) return;
	var x = new getObj(name);
	x.style.visibility = (flag) ? 'hidden' : 'visible'
}

var texttop = 400;

function move(amount, name)
{
	if (!DHTML) return;
	var x = new getObj(name);
	texttop += amount;
	x.style.top = texttop;
}


function changeCol(col, name)
{
	if (!DHTML) return;
	var x = new getObj(name);
	x.style.color = col;
}