So I have been working really hard trying to complete my hangman game, but I cannot find whats wrong with my code. As you can see, when you hit "start", one star pops up. I am trying to get the amount of letters in the hidden word pop up. Also, when I try and guess the letter of the word, nothing seems to happen. I am not looking for the answer, rather I am just looking for someone to point me in the correct direction to finish this. Here is my code. Any help is greatly appreciated.
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Untitled Document</title>
<body>
<script>
var start = true;
var words = new Array("ANIMAL", "BREWERS", "FIERCE" , "XIOLPHONE" ,"BEAR", "BASEBALL", "PACKERS", "START", "ZEBRA");
var guess = "";
var show = ""; //display
var gone = ""; //used letters
var guesses= new Array ();


//function createMask = make
function make(m)
{
mask = "";
word_length = m.length;


for (i = 0; i < word_length; i ++)
{
mask += "*";
}
return mask;
}




//chosing random word

function choose()
{

start = true;
random_number = Math.round(Math.random() * (words.length - 1));
guess = words[random_number];


updatedisplayword();

}


function guess(ch){
length = guesses.length;
for( i = 0; i< length; i ++){
if(ch == guesses[i]){
return;

}
}

guesses.push(ch);


}


function updatedisplayword(){
dw.value ='';

length = guess.length;


for(var i = 0; i< length; i++){

if(isguessed( guess.charAt(i) )){
dw.value += guess.charAt(i);
}else{
dw.value = dw.value +"*";
}
}
}

function isguessed(ch){
length = guesses.length;
for( i = 0; i< length; i ++){
if(ch == guesses[i]){
return true;
}
}

return false;
}




</script>




<body onLoad="reset(); return true;">


<div id="wrapper">
<form name="game">
Display Word: <input id="dw" type="text" name="show"><br>
Failed: <input type="text" name="usedLetters">
</form>

<INPUT TYPE="BUTTON" VALUE=" A " ONCLICK="guess('A')">
<INPUT TYPE="BUTTON" VALUE=" B " ONCLICK="guess('B')">
<INPUT TYPE="BUTTON" VALUE=" C " ONCLICK="guess('C')">
<INPUT TYPE="BUTTON" VALUE=" D " ONCLICK="guess('D')">
<INPUT TYPE="BUTTON" VALUE=" E " ONCLICK="guess('E')">
<br>
<INPUT TYPE="BUTTON" VALUE=" F " ONCLICK="guess('F')">
<INPUT TYPE="BUTTON" VALUE=" G " ONCLICK="guess('G')">
<INPUT TYPE="BUTTON" VALUE=" H " ONCLICK="guess('H')">
<INPUT TYPE="BUTTON" VALUE=" I " ONCLICK="guess('I')">
<INPUT TYPE="BUTTON" VALUE=" J " ONCLICK="guess('J')">
<br>
<INPUT TYPE="BUTTON" VALUE=" K " ONCLICK="guess('K')">
<INPUT TYPE="BUTTON" VALUE=" L " ONCLICK="guess('L')">
<INPUT TYPE="BUTTON" VALUE=" M " ONCLICK="guess('M')">
<INPUT TYPE="BUTTON" VALUE=" N " ONCLICK="guess('N')">
<INPUT TYPE="BUTTON" VALUE=" O " ONCLICK="guess('O')">
<br>
<INPUT TYPE="BUTTON" VALUE=" P " ONCLICK="guess('P')">
<INPUT TYPE="BUTTON" VALUE=" Q " ONCLICK="guess('Q')">
<INPUT TYPE="BUTTON" VALUE=" R " ONCLICK="guess('R')">
<INPUT TYPE="BUTTON" VALUE=" S " ONCLICK="guess('S')">
<INPUT TYPE="BUTTON" VALUE=" T " ONCLICK="guess('T')">
<br>
<INPUT TYPE="BUTTON" VALUE=" U " ONCLICK="guess('U')">
<INPUT TYPE="BUTTON" VALUE=" V " ONCLICK="guess('V')">
<INPUT TYPE="BUTTON" VALUE=" W " ONCLICK="guess('W')">
<INPUT TYPE="BUTTON" VALUE=" X " ONCLICK="guess('X')">
<INPUT TYPE="BUTTON" VALUE=" Y " ONCLICK="guess('Y')">
<INPUT TYPE="BUTTON" VALUE=" Z " ONCLICK="guess('Z')">
<input value="start" type="button" onclick="choose()">

</div>
</body>