Just Dice New Updated Script

// ==UserScript==
// @name       JUST-DICE
// @namespace  http://use.i.E.your.homepage/
// @version    0.1
// @description  enter something useful
// @match      https://just-dice.com/*
// @copyright  2012+, You
// ==/UserScript==

/////////      CONST     /////////
var betRate=0.25;
var riskTimes=10;


/////// DO NOT EDIT BELOW ///////
var currentBet;
var startBalance;
var lastBalance;
var currentBalance;
var rollTimer,initTimer;
var startBtn,stopBtn,txtThresholdBalance,minBtn,maxBtn,spanCurrentBet;
// 0:game started, 2:clicked, 1:rolled, 2:result
var currentStep;
var justDiceMinBet=0.00000001;

/////////    functions ////////
function hasClass(element, cls) {
    return (' ' + element.className + ' ').indexOf(' ' + cls + ' ') > -1;
}

function isNumber(n) {
  return !isNaN(parseFloat(n)) && isFinite(n);
}

function minMyBet(){
 txtThresholdBalance.value=justDiceMinBet;
 showBetValue();
}

function maxMyBet(){
 txtThresholdBalance.value=prettyFloat(currentBalance);
 showBetValue();
}

function showBetValue(){
 var thbl=txtThresholdBalance.value;
 if (isNumber(thbl)) {
  currentBet=calcBet(thbl,betRate,riskTimes);
  if (currentBet<justDiceMinBet) {
   startBtn.disabled=true;
   spanCurrentBet.innerText=" thresholdBalance MUST >= "+prettyFloat(justDiceMinBet);
  }
  else{
   startBtn.disabled=false;
   spanCurrentBet.innerText=prettyFloat(currentBet);
  }
 }
 else{
  currentBet=0;
  spanCurrentBet.innerText=thbl + ' is not a VAILD value.';
 }
}

function calcBet(balance,betRate,riskTimes){
 var riskCount=1;
 for (var i = 1; i <= riskTimes; i++) {
  riskCount+=Math.pow(2,i);
 };
 return justDiceMinBet;
}

function calcBalance(bet,betRate,riskTimes){
 var riskCount=1;
 for (var i = 1; i <= riskTimes; i++) {
  riskCount+=Math.pow(2,i);
 };
 return justDiceMinBet;
}

function prettyFloat(value){
 var dashPos=value.toString().indexOf('-');
 if (value<1&&dashPos!=-1) {
  return value.toFixed(value.toString().substr(dashPos+1));
 }
 else{
  return value;
 }
}

function roll(){
 // GAME STARTED
 if (currentStep==0) {
  document.getElementById('pct_bet').value=prettyFloat(currentBet);
  currentStep=1;
  document.getElementById('a_hi').click();
 }

 // CLICKED
 if (currentStep==1) {
  if(hasClass(document.getElementById('a_hi'),'waiting')){
   currentStep=2;
  }
 }

 // ROLLED
 if (currentStep==2) {
  if(!hasClass(document.getElementById('a_hi'),'waiting')){
   currentStep=3;
  }
 }

 // RESULT
 if (currentStep==3) {
  currentBalance=document.getElementById('pct_balance').value;
  if (currentBalance>lastBalance) {

   currentBet=calcBet(currentBalance,betRate,riskTimes);
   resultLog('win');
  }
  else if (currentBalance<lastBalance) {
   currentBet*=1.72;
   resultLog('losses');
  }
  else{
   return;
  }
  lastBalance=currentBalance;
  currentStep=0;
 }
}

function startGame(){
 console.log("Game Started.")
    rollTimer=window.setInterval(roll,200);
}

function stopGame(){
 window.clearInterval(rollTimer);
 stopBtn.style.display='none';
 startBtn.style.display='none';
}

function resultLog(resultStr){
 console.log(resultStr+'. CurrentBet: '+ prettyFloat(currentBet));
}

function init(){

 // Test is just-dice fully loaded
 if (isNumber(document.getElementById('pct_balance').value)){
  window.clearInterval(initTimer);
  console.log('fully loaded'+document.getElementById('pct_balance').value);
 }
 else{
  console.log('not fully loaded return');
  return;
 }

 // Init Variables
 startBalance=document.getElementById('pct_balance').value;
 currentBalance=document.getElementById('pct_balance').value;
 lastBalance=document.getElementById('pct_balance').value;
 currentStep=0;

 // Start BUTTON
 startBtn=document.createElement('BUTTON');
 var textStartBtn=document.createTextNode('Start!');
 startBtn.disabled=true;
 startBtn.appendChild(textStartBtn);
 document.getElementById('msg').parentNode.appendChild(startBtn);
 startBtn.addEventListener('click',startGame,false);

 // Stop BUTTON
 stopBtn=document.createElement('BUTTON');
 var textStopBtn=document.createTextNode('Stop...');
 stopBtn.disabled=true;
 stopBtn.appendChild(textStopBtn);
 document.getElementById('msg').parentNode.appendChild(stopBtn);
 stopBtn.addEventListener('click',stopGame,false);

 // Threshold INPUT BOX
 txtThresholdBalance=document.createElement('INPUT');
 txtThresholdBalance.type='text';
 txtThresholdBalance.width='50px';
 txtThresholdBalance.onkeypress=showBetValue;
 document.getElementById('msg').parentNode.appendChild(txtThresholdBalance);

 // Min BUTTON
 minBtn=document.createElement('BUTTON');
 var textMinBtn=document.createTextNode('Min');
 minBtn.appendChild(textMinBtn);
 document.getElementById('msg').parentNode.appendChild(minBtn);
 minBtn.addEventListener('click',minMyBet,false);

 // Max BUTTON
 maxBtn=document.createElement('BUTTON');
 var textMaxBtn=document.createTextNode('Max');
 maxBtn.appendChild(textMaxBtn);
 document.getElementById('msg').parentNode.appendChild(maxBtn);
 maxBtn.addEventListener('click',maxMyBet,false);

 // CurrentBet SPAN
 spanCurrentBet=document.createElement('SPAN');
 spanCurrentBet.text="abc";
 document.getElementById('msg').parentNode.appendChild(spanCurrentBet);

 // Default set min bet
 minBtn.click();
}


////////////////  start from here  ///////////////////
initTimer=window.setInterval(init,100);