jQueryMobile AJAX

<!DOCTYPE HTML>
<html>
<head>
	<link rel="stylesheet" href="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.css" />
	<script src="http://code.jquery.com/jquery-1.11.1.min.js"></script>
	<script src="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.js"></script>

	<meta charset="UTF-8">
	<script>
		$(document).on("pageshow", "#mainPage", function(){
			var refreshID = setInterval(function(){
				$.get("?requestState=0", function(data, status){
					alert("worked1");
					if(status=="success"){
						alert("worked2");
						if(data.indexOf("ventswitch=true") > -1){
							$("#switchvent").attr("checked", null);
							alert("inside");
						}
						else if(data.indexOf("ventswitch=false") > -1)
							$("#switchvent").attr("checked", "checked");

						if(data.indexOf("lampswitch=true") > -1)
							$("#switchlamp").attr("checked", null);
						else if(data.indexOf("lampswitch=false") > -1)
							$("#switchlamp").attr("checked", "checked");
						alert("worked3");
					}
				});
			}, 5000);

			//$.ajaxSetup({ cache: false });

			$("#lampswitch").on("tap", function(){
        				$.get("?requestState=1");
			});

			$("#ventswitch").on("tap", function(){
				$.get("?requestState=3");
			});
		});
	</script>
</head>
<body>
	<div data-role="page" id="mainPage" data-theme="b">
		<div data-role="header" class="ui-content">
			<h1> Sistema de Automação Residencial </h1>
		</div>
		<div data-role="main" class="ui-content">
			<form id="form" style="text-align:center">
				<label for="switchvent">Lampada:</label>
				<span id="lampswitch"><input type="checkbox" id="switchvent" name="switch1"

data-role="flipswitch" data-on-text="On" data-off-text="Off" ></span>
				<!-- THE ONLY REASON TO USE <SPAN> ELEMENT IS BECAUSE <input

type="checkbox" data-role="flipswitch"> doesn't work with any click or touch events -->
				<label for="switchlamp">Ventilador:</label>
				<span id="ventswitch"><input type="checkbox" id="switchlamp" name="switch2"

data-role="flipswitch" data-on-text="On" data-off-text="Off" ></span>
			</form>
		</div>
		<div data-role="footer" class="ui-content">
			<h1> Versão 0.0.1 </h1>
		</div>
	</div>
</body>
</html>