var Book_Speed=20;
var Book_NextPage_Delay=4000;

var B_Pre_Img = new Array(Book_Image_Sources.length);
var B_LI, B_MI, B_RI, B_TI, B_Angle = 0, B_CrImg = 6, B_MaxW, B_Direction = 1;
var B_MSz, B_Stopped = false;

function Book_SlideShow() {
	if (document.getElementById) {
		for (i = 0; i < Book_Image_Sources.length; i += 2) {
			B_Pre_Img[i] = new Image();
			B_Pre_Img[i].src = Book_Image_Sources[i];
		}
		Book_Div = document.getElementById("book");
		B_LI = document.createElement("img");
		B_RI = document.createElement("img");
		B_MI = document.createElement("img");
		Book_Div.appendChild(B_LI);
		Book_Div.appendChild(B_RI);
		Book_Div.appendChild(B_MI);	
		B_LI.style.position = B_MI.style.position = B_RI.style.position = "absolute";
		B_LI.style.zIndex = B_RI.style.zIndex = 0;
		B_MI.style.zIndex = 1;
		B_LI.style.top = (Book_Vertical_Turn ? (Book_Image_Height + 1) : 0) + "px";
		B_LI.style.left = 0 + "px";
		B_MI.style.top = B_RI.style.top = 0 + "px";
		B_MI.style.left = B_RI.style.left = (Book_Vertical_Turn ? 0 : (Book_Image_Width + 1)) + "px";
		B_LI.style.height = B_MI.style.height = B_RI.style.height = Book_Image_Height + "px";
		B_LI.style.width = B_MI.style.width = B_RI.style.width = Book_Image_Width + "px";
		if (Book_Border_Size > 0) {
			B_LI.style.borderStyle = B_MI.style.borderStyle = B_RI.style.borderStyle = "solid";
			B_LI.style.borderWidth = B_MI.style.borderWidth = B_RI.style.borderWidth = Book_Border_Size + "px";
			B_LI.style.borderColor = B_MI.style.borderColor = B_RI.style.borderColor = Book_Border_Color;
		}
		B_LI.src = B_Pre_Img[0].src;
		B_LI.lnk = Book_Image_Sources[1];
		B_MI.src = B_Pre_Img[2].src;
		B_MI.lnk = Book_Image_Sources[3];
		B_RI.src = B_Pre_Img[4].src;
		B_RI.lnk = Book_Image_Sources[5];
		B_LI.onclick = B_MI.onclick = B_RI.onclick = Book_Link;
		B_LI.onmouseover = B_MI.onmouseover = B_RI.onmouseover = Book_Stop;
		B_LI.onmouseout = B_MI.onmouseout = B_RI.onmouseout = Book_Restart;
		Book_Images();
	}
}

function Book_Images() {
	if (!B_Stopped) {
		if (Book_Vertical_Turn) {
			B_MSz = Math.abs(Math.round(Math.cos(B_Angle)*Book_Image_Height));
			MidOffset = (!B_Direction) ? (Book_Image_Height + 1) : (Book_Image_Height - B_MSz);
			B_MI.style.top = MidOffset + "px";
			B_MI.style.height = B_MSz + "px";
		}
		else {
			B_MSz = Math.abs(Math.round(Math.cos(B_Angle)*Book_Image_Width));
			MidOffset = (B_Direction) ? (Book_Image_Width + 1) : (Book_Image_Width - B_MSz);
			B_MI.style.left = MidOffset + "px";
			B_MI.style.width = B_MSz+"px";
		}
		B_Angle += Book_Speed/720*Math.PI;
		if (B_Angle >= Math.PI/2&&B_Direction) {
			B_Direction=0;
			if (B_CrImg == Book_Image_Sources.length) B_CrImg = 0;
			B_MI.src = B_Pre_Img[B_CrImg].src;
			B_MI.lnk = Book_Image_Sources[B_CrImg+1];
			B_CrImg += 2;
		}
		if (B_Angle >= Math.PI) {
			B_Direction = 1;
			B_TI = B_LI;
			B_LI = B_MI;
			B_MI = B_TI;
			if (Book_Vertical_Turn) {
				B_MI.style.top = 0 + "px";
			}
			else {
				B_MI.style.left = Book_Image_Width + 1 + "px";
			}
			B_MI.src = B_RI.src;
			B_MI.lnk = B_RI.lnk;
			setTimeout("Book_Next_Delay()", Book_NextPage_Delay)
		}
		else {
			setTimeout("Book_Images()",50);
		}
	}
	else {
		setTimeout("Book_Images()",50);
	}
}

function Book_Next_Delay() {
	if (B_CrImg == Book_Image_Sources.length) B_CrImg = 0;
	B_RI.src = B_Pre_Img[B_CrImg].src;
	B_RI.lnk = Book_Image_Sources[B_CrImg+1];
	B_MI.style.zIndex = 2;
	B_LI.style.zIndex = 1;
	B_Angle = 0;
	B_CrImg += 2;
	setTimeout("Book_Images()",50);
}

function Book_Link() {
	if (this.lnk) window.location.href = this.lnk;
}

function Book_Stop() {
	B_Stopped = true;
	this.style.cursor = this.lnk ? "pointer" : "default";
}

function Book_Restart() {
	B_Stopped = false;
}