// JavaScript Document

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;
	}
	myCountdown();
}

 function myCountdown() {
          	
	      if (seconds > 0) {
		seconds = seconds - 1;
	      }

	      if (seconds == 0) { 
		document.getElementById("toc").style.display = "block";
		document.getElementById("navButtons").style.display = "block";      	
	      }
	      else { 
		document.getElementById("toc").style.display = "none";
		document.getElementById("navButtons").style.display = "none";
		setTimeout("myCountdown()", 1000);
	      }	
          
    }