JSFiddle - React, Tailwind, and code Playground
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>NN MAP</title>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<link rel="stylesheet" type="text/css" media="all" href="http://nn-gis.com/mp/css/form.css" />
<script type="text/javascript" src="http://nn-gis.com/mp/js/main.js"></script>
<script type="text/javascript" src="http://nn-gis.com/mp/js/line.js"></script>
<script type="text/javascript" src="http://nn-gis.com/mp/js/zoom.js"></script>
</head>
<div id="Content">
<body onload="load()">
<div id="map" style=" width:100%; height:100%; position:fixed" ></div>
</div>
<div id="Menu" >
<fieldset> <legend>Control Panel</legend> - <a href="logout.php">Logout</a> <br/>- <a HREF="javascript:void(0)"onclick="window.open('change.php?sid=<?php echo session_id(); ?>','Reservoirs','height=300, width=460,scrollbars=no')">Change Password</a></fieldset>
<fieldset>
<legend>Active Layers</legend>
<div class="glossymenu">
<a class="menuitem submenuheader" href="#" >Points</a>
<div class="submenu">
<input type="checkbox" id="intake" onclick="boxclick(this,'intake')" checked="checked"/> <label>Intake</label> <br/>
<input type="checkbox" id="reservoir" onclick="boxclick(this,'reservoir')"checked="checked"/> <label>Reservoirs</label> <br/>
<input type="checkbox" id="wps" onclick="boxclick(this,'wps')"checked="checked"/> <label>WPS</label> <br/>
<input type="checkbox" id="wtp" onclick="boxclick(this,'wtp')"checked="checked"/> <label> WTP</label> <br/>
<input type="checkbox" id="wwps" onclick="boxclick(this,'wwps')"checked="checked"/> <label>WWPS</label> <br/>
<input type="checkbox" id="wwtp" onclick="boxclick(this,'wwtp')"checked="checked"/> <label>WWTP</label> <br/>
</div>
</fieldset>
...