var Book_Image_Width = 200;
var Book_Image_Height = 200;
var Book_Border = true;
var Book_Border_Color = "gray";
var Book_Speed = 25;
var Book_NextPage_Delay = 1500; //1 second=1000
var Book_Vertical_Turn = 0;
var B_LI, B_MI, B_RI, B_TI, B_Angle = 0, B_CrImg = 6, B_MaxW, B_Direction = 1;
var B_MSz, B_Stppd = false; B_Pre_Img = new Array(Book_Image_Sources.length);

function ImageBook() {
    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"); Book_Div.appendChild(B_LI);
        B_RI = document.createElement("img"); Book_Div.appendChild(B_RI);
        B_MI = document.createElement("img"); 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 = 0 + "px";
        B_MI.style.left = (Book_Vertical_Turn ? 0 : Book_Image_Width + 1) + "px";
        B_RI.style.top = 0 + "px";
        B_RI.style.left = (Book_Vertical_Turn ? 0 : Book_Image_Width + 1) + "px";
        B_LI.style.height = Book_Image_Height + "px";
        B_MI.style.height = Book_Image_Height + "px";
        B_RI.style.height = Book_Image_Height + "px";
        B_LI.style.width = Book_Image_Width + "px";
        B_MI.style.width = Book_Image_Width + "px";
        B_RI.style.width = Book_Image_Width + "px";
        if (Book_Border) {
            B_LI.style.borderStyle = B_MI.style.borderStyle = B_RI.style.borderStyle = "solid";
            B_LI.style.borderWidth = 1 + "px";
            B_MI.style.borderWidth = 1 + "px";
            B_RI.style.borderWidth = 1 + "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 = B_LdLnk;
        B_LI.onmouseover = B_MI.onmouseover = B_RI.onmouseover = B_Stp;
        B_LI.onmouseout = B_MI.onmouseout = B_RI.onmouseout = B_Rstrt;
        BookImages()
    } 
}

function BookImages() {
    if (!B_Stppd) {
        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("BookImages()", 50)
    }
    else setTimeout("BookImages()", 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("BookImages()", 50)
}

//function B_LdLnk() { if (this.lnk) window.location.href = this.lnk }
function B_LdLnk() {if (this.lnk) window.open(this.lnk, '_blank'); }
function B_Stp() { B_Stppd = true; this.style.cursor = this.lnk ? "pointer" : "default" }
function B_Rstrt() { B_Stppd = false }