Netscape 6, Part V: DOCJSLIB 1.1

The Tic-Tac-Toe Code

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<SCRIPT LANGUAGE="JavaScript" SRC="docjslib.js">
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<SCRIPT LANGUAGE="JavaScript">

function rowComplete() {
  var lastPlayedBy = grid[1][1];
  if ((lastPlayedBy != "") &&
      (grid[2][1] == lastPlayedBy) &&
      (grid[3][1] == lastPlayedBy)) return(true);
  lastPlayedBy = grid[1][2];
  if ((lastPlayedBy != "") && 
      (grid[2][2] == lastPlayedBy) &&
      (grid[3][2] == lastPlayedBy)) return(true);
  lastPlayedBy = grid[1][3];
  if ((lastPlayedBy != "") && 
      (grid[2][3] == lastPlayedBy) &&
      (grid[3][3] == lastPlayedBy)) return(true);
  lastPlayedBy = grid[1][1];
  if ((lastPlayedBy != "") && 
      (grid[1][2] == lastPlayedBy) &&
      (grid[1][3] == lastPlayedBy)) return(true);
  lastPlayedBy = grid[2][1];
  if ((lastPlayedBy != "") && 
      (grid[2][2] == lastPlayedBy) &&
      (grid[2][3] == lastPlayedBy)) return(true);
  lastPlayedBy = grid[3][1];
  if ((lastPlayedBy != "") && 
      (grid[3][2] == lastPlayedBy) &&
      (grid[3][3] == lastPlayedBy)) return(true);
  lastPlayedBy = grid[1][1];
  if ((lastPlayedBy != "") && 
      (grid[2][2] == lastPlayedBy) &&
      (grid[3][3] == lastPlayedBy)) return(true);
  lastPlayedBy = grid[1][3];
  if ((lastPlayedBy != "") && 
      (grid[2][2] == lastPlayedBy) &&
      (grid[3][1] == lastPlayedBy)) return(true);
}

function itsAtie() {
  for( var i = 1; i <= 3; i++)
    for( var j = 1; j <= 3; j++)
      if (grid[i][j] == "") return(false);
  return(true);
}

function handleImageClick(id, param1, param2) {
    if (getSrc(id).indexOf('initialbutton.gif') < 0) return;  
    if (lastPlayedBy == "o") {
      setSrc(id, "xbutton.gif");
      lastPlayedBy = "x";
    } 
    else {  // lastPlayedBy = "x"
      setSrc(id, "obutton.gif");
      lastPlayedBy = "o";
    }
    grid[param1][param2] = lastPlayedBy;
    if (rowComplete()) {
      alert("The " + lastPlayedBy + " wins");
      window.location.reload();
    }
    else if (itsAtie()) {
           alert("It's a tie");
           window.location.reload();
         }
}

var lastPlayedBy = "o";
var grid = new Array();
grid[1] = new Array();
grid[2] = new Array();
grid[3] = new Array();

for (var i = 1; i <= 3; i++)
  for (var j = 1; j <= 3; j++)
    grid[i][j] = "";
 

var xBase = 8;
var yBase = 8;
for (var i = 1; i <= 3; i++) {
  for (var j = 1; j <= 3; j++) {
    makeImage("box" + i + "" + j,          // id
              "initialbutton.gif",         // URL
              100,                         // height
              100,                         // width
              "game box",                  // alternative
               xBase + (i-1) * 108,        // position from left
               yBase + (j-1) * 108,        // position from top
               i,                          // parameter passed to onclick handler
               j);                         // parameter passed to onclick handler
  }
}


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