var Game0_Ply_Text = null;
var Game0_Ply_Position = null;
var Game0_Ply_Comment = null;
var Game0_Max_Ply = 0;
var shade = null;
var Current_Position = null;
var Current_Comment = null;
var Current_Ply_Text = null;
var Current_Game_Max_Ply = 0;
var Current_Game_Ply = 0;
var dir_path = null;
// Function to map light and dark squares.
function Square_is_Light_or_Dark()
{
var row, col;
var square;
shade = new Array();
for(row = 0, square = 0; row < 8; row++)
{
for(col = 0; col < 8; col++, square++)
{
if ((row + col) % 2 != 0)
shade[square] = "d.gif";
else
shade[square] = "l.gif";
}
}
}
// Function to Select Game for Display
function Select_Game()
{
Current_Game_Ply = 0;
Current_Position = Game0_Ply_Position[0];
Current_Comment = Game0_Ply_Comment[0];
Current_Ply_Text = Game0_Ply_Text[0];
Current_Game_Max_Ply = Game0_Max_Ply;
Display_Diagram(Current_Position, Current_Comment, Current_Ply_Text);
}
// Function to Display Move
function Move(Ply)
{
Current_Game_Ply = Ply;
Current_Position = Game0_Ply_Position[Ply];
Current_Comment = Game0_Ply_Comment[Ply];
Current_Ply_Text = Game0_Ply_Text[Ply];
Display_Diagram(Current_Position, Current_Comment, Current_Ply_Text);
}
// Function to Display Next Move
function Next_Move()
{
Current_Game_Ply++;
Current_Position = Game0_Ply_Position[Current_Game_Ply];
Current_Comment = Game0_Ply_Comment[Current_Game_Ply];
Current_Ply_Text = Game0_Ply_Text[Current_Game_Ply];
Display_Diagram(Current_Position, Current_Comment, Current_Ply_Text);
}
// Function to Display Previous Move
function Previous_Move()
{
Current_Game_Ply--;
Current_Position = Game0_Ply_Position[Current_Game_Ply];
Current_Comment = Game0_Ply_Comment[Current_Game_Ply];
Current_Ply_Text = Game0_Ply_Text[Current_Game_Ply];
Display_Diagram(Current_Position, Current_Comment, Current_Ply_Text);
}
// Function to convert Forsythe_Notation to a 64-square board array.
function Display_Diagram(Forsythe_Notation, Comment, Ply_Text)
{
var index, num, row, col;
var num_of_empty_squares = 0;
var length_of_Forsythe_Notation = 0;
var current_char = "";
var icon = "";
var piece;
var square;
piece = new Array();
square = 0;
length_of_Forsythe_Notation = Forsythe_Notation.length;
for (index = 0; index < length_of_Forsythe_Notation; index++)
{
current_char = Forsythe_Notation.charAt(index);
if (current_char == "/")
continue;
if (current_char == "p")
{
piece[square++] = "bp";
continue;
}
if (current_char == "P")
{
piece[square++] = "wp";
continue;
}
if (current_char == "n")
{
piece[square++] = "bn";
continue;
}
if (current_char == "N")
{
piece[square++] = "wn";
continue;
}
if (current_char == "b")
{
piece[square++] = "bb";
continue;
}
if (current_char == "B")
{
piece[square++] = "wb";
continue;
}
if (current_char == "r")
{
piece[square++] = "br";
continue;
}
if (current_char == "R")
{
piece[square++] = "wr";
continue;
}
if (current_char == "k")
{
piece[square++] = "bk";
continue;
}
if (current_char == "K")
{
piece[square++] = "wk";
continue;
}
if (current_char == "q")
{
piece[square++] = "bq";
continue;
}
if (current_char == "Q")
{
piece[square++] = "wq";
continue;
}
num_of_empty_squares = parseInt(current_char);
for (num = 0; num < num_of_empty_squares; num++)
{
piece[square++] = "s";
}
}
//
//Create Diagram Display HTML
//
parent.frames[1].document.open();
parent.frames[1].document.write("");
parent.frames[1].document.write("");
for (row = 0, square = 0; row < 8; row++)
{
for (col = 0; col < 8; col++, square++)
{
icon = "img src=\"" + dir_path + "chessboard/" + piece[square] + shade[square] + "\" height=33 width=33";
parent.frames[1].document.write("<" + icon + ">");
}
parent.frames[1].document.write("
");
}
parent.frames[1].document.write("");
parent.frames[1].document.write(Ply_Text + "
");
parent.frames[1].document.write("");
parent.frames[1].document.write("
");
parent.frames[1].document.write(Comment + "
");
parent.frames[1].document.write("");
parent.frames[1].document.close();
}