// Showing the HangMan game

document.write('<div style="background-color:#EFEFEF;position:relative; top:0px; left:0px; border:2px ridge #BBBBBB; width:200px; height:280px; font-family:Times New Roman; font-weight:normal; font-style:normal; text-decoration:none;">');
document.write(' <form action="" method="post" onsubmit="return false;"> ');
document.write('  <div id="HangManTitle" style="font-size:22px; position:absolute; top:5px; width:200px; text-align:center;">');
document.write('   Hangman');
document.write('  </div>');
document.write('  <div id="HangManConsole" style="font-size:16px; position:absolute; top:34px; text-align:center; width:200px;">');
document.write('   Enter a letter: <input type="text" maxlength="1" size="1" id="HangManInput" /><input type="button" value="Go" onclick="processLetter()" /><br />');
document.write('   The word: <span id="HangManGuessWord">.......</span><br />');
document.write('  </div>');
document.write('  <div id="HangManImage" style="position:absolute; top:85px; left:22px;">');
document.write('   <img src="http://www.hangman.symbolwebdesign.nl/hmimgs/hm0.bmp" id="HangManIMG" style="border:1px ridge #BBBBBB;" />');
document.write('  </div>');
document.write('  <div id="HangManMessage" style="font-size:16px; position:absolute; top:250px; width:200px; text-align:center;">');
document.write('  </div>');
document.write(' </form>');
document.write('</div>');

// Setting global variables

var theWord = "";
var guessWord = "";
var error_amount = 0;

function showMessage(message) {
document.getElementById("HangManMessage").innerHTML = message;
}

function updateWord(word) {
document.getElementById("HangManGuessWord").innerHTML = word;
}

function getLetter() {
var letter = document.getElementById("HangManInput").value;
return letter;
}

function showHangman() {
document.getElementById("HangManIMG").src = "http://www.hangman.symbolwebdesign.nl/hmimgs/hm" + error_amount + ".bmp";
}

function initGame() {

// Resetting all variables

theWord = "";
guessWord = "";
error_amount = 0;
showHangman();
showMessage("");
updateWord("");

var ajax = false;

// Create the object:

// Choose the objecttype, depending on what is supported:
if (window.XMLHttpRequest) {

    // IE 7, Mozilla, Safari, Firefox, Opera, most browsers:
    ajax = new XMLHttpRequest();

} else if (window.ActiveXObject) { // Old IE-browsers

    // Make the type Msxml2.XMLHTTP, if possible:
    try {
        ajax = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e1) { // Else use the other type:
        try {
            ajax = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e2) { }
    }

}

if (ajax) {
  
  // Here you can change the words file into whatever you'd like, as long as it is local:
  
  var url = "words.txt";
  
  // Starting the communication
  
  ajax.open('get', url);

   // Sends request
   
   ajax.send(null);
   
   // Function that handles response
   
   ajax.onreadystatechange=function(){
   
    // If everything is OK:

     if ( (ajax.readyState == 4) && (ajax.status == 200) ) {
	 
        // Returns the value to the word
        var wordsText = ajax.responseText;
        
        // Splitting the text
        
        var words = wordsText.split("|");
        
        // Retrieving a random number
        		
        var randomNumber = Math.floor(Math.random() * (words.length));
        
        // Setting theWord
        
        theWord = words[randomNumber];
        
        // Creating guessWord, consisting out of dots
        
        for (i = 0; i < theWord.length; i++) {
        guessWord += '.';
        }
        
        updateWord(guessWord);
        
     } else if (ajax.status == 204 || ajax.status == 400 || ajax.status == 401 || ajax.status == 403 || ajax.status == 404 || ajax.status == 408 || ajax.status == 500) {
	   showMessage("Can't open words file - " + ajax.status);
	 }
    }
        
        
} else { // AJAX is not useable
        alert('It is not possible to connect, please update your browser.');
}

} // End of function initGame();

function isAlphaNumeric(str){
  var regExp = /[^a-zA-Z]/g
  if (regExp.test(str)) {
  return false;
  } else {
  return true;
  }
}

function processLetter() {

// Retrieving the letter

var letter = document.getElementById("HangManInput").value;

if (isAlphaNumeric(letter)) {

// Saving the guessWord for later comparison

var prevGuessWord = guessWord;

// Declaring character arrays

var wordLetters = new Array;
var guessWordLetters = new Array;

// Filling the wordLetters array with the characters of the word
// that needs to be guessed

for (i = 0; i < theWord.length; i++) {
wordLetters[i] = theWord.substr(i, 1);
}

// Filling the guessWordLetters array with the character of the guessWord

for (d = 0; d < guessWord.length; d++) {
guessWordLetters[d] = guessWord.substr(d, 1);
}

// Checking wether the guess letter is in theWord, and if it is
// replace the dot in the guessWord

for (x = 0; x < theWord.length; x++) {
if (wordLetters[x] == letter) {
guessWordLetters[x] = letter;
}
}

// Replacing the guessWord with the character array guessWOrdLetters
// It gets replaced and it's different (a letter was guess) the word will be updated
// else it will not be changed and the error amount will be raised

guessWord = "";

for (c = 0; c < prevGuessWord.length; c++) {
guessWord += guessWordLetters[c];
}

if (guessWord == prevGuessWord && error_amount < 9 && guessWord != theWord) {
error_amount++;
showHangman();
} else {
updateWord(guessWord);
}

if ((guessWord == theWord) || error_amount >= 9) {
if (error_amount >= 9) {
showMessage("You lost! <span style='cursor:pointer; text-decoration:underline;' onclick='initGame()'>Try again?</span>");
updateWord(theWord);
}
if (guessWord == theWord) {
showMessage("You won! <span style='cursor:pointer; text-decoration:underline;' onclick='initGame()'>Try again?</span>");
}
}

document.getElementById("HangManInput").value = "";
document.getElementById("HangManInput").focus();

} else {
if ((guessWord != theWord) && error_amount < 9) {
showMessage("Only letters are allowed!");
}
document.getElementById("HangManInput").value = "";
document.getElementById("HangManInput").focus();
}

} // End of checkLetter(letter) function

window.onload = initGame();