Code viewer for World: Battleship 1

AB.loadCSSstring ( `
        body {
        background-color: #eff;
          } 
    ` );


    

      var game = [    [".", ".", ".", ".", ".", ".", ".", ".", "."],
                      [".", ".", ".", ".", ".", ".", ".", ".", "."],
                      [".", ".", ".", ".", ".", ".", ".", ".", "."],
                      [".", ".", ".", ".", ".", ".", ".", ".", "."],
                      [".", ".", ".", ".", ".", ".", ".", ".", "."],
                      [".", ".", ".", ".", ".", ".", ".", ".", "."],
                      [".", ".", ".", ".", ".", ".", ".", ".", "."],
                      [".", ".", ".", ".", ".", ".", ".", ".", "."],
                      [".", ".", ".", ".", ".", ".", ".", ".", "."],             ];
                      
                      
      var board = document.createElement("PRE");
       // Preparing the HTML <pre> element to display the board on the page
       document.body.appendChild(board);
       
       
      var button=document.createElement("BUTTON");
      // Preparing the "Fire! button to allow the player to fire at the ship
      button.onclick = fire;       // Clicking the button calls the fire() function
      var t=document.createTextNode("Fire!");
      document.body.appendChild(button);
      button.appendChild(t);
      
      
      function drawBoard() {
        var boardContents = "";
        var i;  var j;
      for (i=0; i<9; i++) {
        for (j=0; j<9; j++) {
          boardContents = boardContents + game[i][j]+" ";
          // Append array contents for each board square
        }
        boardContents = boardContents + "<br>";
        // Append a line break at the end of each horizontal line
      }  return boardContents;
      // Return string representing board in HTML
      }
      
      
      board.innerHTML = drawBoard();
      // Display the board on the page using the above function
      
      
      var x=prompt("Where would you like to place your ship? Enter an X coordinate: (0-8)");
      var y=prompt("Where would you like to place your ship? Enter a Y coordinate: (0-8)");
      var direction=prompt("Place (h)orizontally, (v)ertically");
      
      x = Number(x);  // Convert the string returned by "prompt" into a number
      y = Number(y);  // Convert the string returned by "prompt" into a number
      
      if (direction[0] == "h") {
        var c;
        for (c = x; c < (x + 4); c++)
        {
          game[y][c] = '#';
        }
      }
      // Draw cruiser vertically
      if (direction[0] == "v") {
        var c;
        for (c = y; c < (y + 4); c++)
        {
          game[c][x] = '#';
        }
      }
      
      
      board.innerHTML = drawBoard(); // Redraw board with cruiser added
      
      
      // Function for firing a shot when the "Fire! button is pressed
      function fire() {
        var fireX=prompt("Where would you like to fire? Enter an X coordinate: (0-8)");
        var fireY=prompt("Where would you like to fire? Enter a Y coordinate: (0-8)");
        
        fireX = Number(fireX);
        // Convert the string returned by "prompt" into a number
        fireY = Number(fireY);
        //  Convert the string returned by "prompt" into a number
        
        if (game[fireY][fireX] == ".") {
          // Check if the specified coordinate is occupied by the cruiser
          alert("You Missed.");
        }
        else if (game[fireY][fireX] == "*") {
          alert("You already hit the ship there.");
        } else {
          alert("Kaboom! You hit a ship");
          game[fireY][fireX] = "*";
          board.innerHTML = drawBoard();
          // Redraw board with hit marker at specified coordinate
        }
        
        var shipfound;
        var i;
        var j;
        // Check if there are any ships remaining on the board
         for (i=0; i<9; i++) {
           for (j=0; j<9; j++) {
              if (game[i][j] != "." && game[i][j] != "*") {
                shipfound = true;
                // Set to true if a ship is found
              }
            }
          }  
          
          if (!shipfound) {
            // If no ships are found end the game
            alert("All ships have been sunk. Well done Captain! Game over");
            document.body.removeChild(button);
            // Remove the fire button from the page after game over
          }
        }