JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <head>
    <title> Submit a Contract </title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
<script type="text/javascript">
    function toggleExternal() {
        document.getElementById("extText").disabled = false;
        var divis_el = document.getElementById("division");
        for (var i = 0; i < divis_el.children.length; i++) {
            divis_el.children[i].disabled = true;
        }
    }
    function toggleDivision() {
        document.getElementById("extText").disabled = true;
        var divis_el = document.getElementById("division");
        for (var i = 0; i < divis_el.children.length; i++) {
            divis_el.children[i].disabled = false;
        }
}
</script>
</head>
<body>
    <form method="post" action="" enctype="multipart/form-data">
        ID: 50<br>
        <input type="hidden" name="id" value="50" />

        <label for = "client1">
        <input type="radio" name="client_type" id = "client1" value="Division" checked onclick="toggleDivision()"/> Division
        </label>
        &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp 
        <label for ="client2">
        <input type="radio" name="client_type" id = "client2" value="External"  onclick="toggleExternal()"/> External
        </label>
        &nbsp 
        <input disabled type="text" id="extText" name="client_details2" value="rrrrrr"/> 
        <br><br>

        <div id="division">
        Division:
        <select name="client_details">
            <option value="Choose"  />Choose Division...</option>
            <option value="Distribution"  />Distribution</option>
            <option value="Transmission"  />Transmission</option>
            <option value="Generation"  />Generation</option>
            <option value="Procument"  />Procument</option>
            <option value="Other"  />Others</option>
        </select>   
        <br><br>
     ...