btcalc

HTML

<html>
<head>
	<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
</head>
<body>
	<form>
		<select id="bettype" name="bettype">
		<option disabled>Bet Type</option>
		<option value="single">single</option>
		<option value="double">double</option>
		<option value="treble">Treble</option>
		<option disabled>Accumulators</option>
		<option value="fourfold">FourFold</option>
		<option value="fivefold">FiveFold</option>
		<option value="sixfold">SixFold</option>
		<option value="sevenfold">SevenFold</option>
		<option value="eightfold">EightFold</option>
		<option value="trixie">Trixie</option>
		</select>
		<div id="selections">
		</div>
	</form>
</body>
 <script>
 $(document).ready(function(){
		$("#bettype").change(function(){
			var bettype = $(this).children("option:selected").val();
			if(bettype == "single")
			{
			$(".removethis").remove();
			$("#selections").append($("<input type='text' value='Single' class='removethis'/>"));
			}else if(bettype == "double")
			{
			$(".removethis").remove();
			$("#selections").append($("<input type='text' value='Selection 1' class='removethis'/>"));
			$("#selections").append($("<input type='text' value='Selection 2' class='removethis'/>"));
			}
			else if(bettype == "treble" || "trixie" || "patent")
			{
			$(".removethis").remove();
			$("#selections").append($("<input type='text' value='Selection 1' class='removethis'/>"));
			$("#selections").append($("<input type='text' value='Selection 2' class='removethis'/>"));
			$("#selections").append($("<input type='text' value='Selection 3' class='removethis'/>"));
			}
			else if(bettype == "fourfold" || "yankee" || "lucky15")
			{
			$(".removethis").remove();
			$("#selections").append($("<input type='text' value='Selection 1' class='removethis'/>"));
			$("#selections").append($("<input type='text' value='Selection 2' class='removethis'/>"));
			$("#selections").append($("<input type='text' value='Selection 3'...