Connection
“   Connection对象提供对设备的蜂窝及WiFi连接信息的访问。
通过navigator.network接口访问该对象。
属性：
常量：
connection.type 
 
检查正在使用的活动网络连接。
说明：
该属性是确定设备网络连接状态和连接类型的快速方法。
支持的平台：
  • iOS
  • Android
  • BlackBerry WebWorks (OS 5.0或更高版本)
  • Windows Phone 7 ( Mango )
简单的范例：
复制
function checkConnection() {
	var networkState = navigator.network.connection.type;
	
	var states = {};
	states[Connection.UNKNOWN]  = 'Unknown connection';
	states[Connection.ETHERNET] = 'Ethernet connection';
	states[Connection.WIFI]     = 'WiFi connection';
	states[Connection.CELL_2G]  = 'Cell 2G connection';
	states[Connection.CELL_3G]  = 'Cell 3G connection';
	states[Connection.CELL_4G]  = 'Cell 4G connection';
	states[Connection.NONE]     = 'No network connection';
	
	alert('Connection type: ' + states[networkState]);
}
	
checkConnection();
完整的范例：
复制
<!DOCTYPE html>
<html>
<head>
<title>navigator.network.connection.type Example</title> 

<script type="text/javascript" charset="utf-8" src="phonegap.js"></script> 	
<script type="text/javascript" charset="utf-8">  

	// 等待加载PhoneGap
	document.addEventListener(“deviceready“, onDeviceReady, false);  

	// PhoneGap加载完毕，可以安全调用PhoneGap方法
	function onDeviceReady() { 
		checkConnection(); 
	}  

	function checkConnection() { 
		var networkState = navigator.network.connection.type; 		 

		var states = {}; 
		states[Connection.UNKNOWN]  = 'Unknown connection'; 
		states[Connection.ETHERNET] = 'Ethernet connection'; 
		states[Connection.WIFI]     = 'WiFi connection'; 
		states[Connection.CELL_2G]  = 'Cell 2G connection'; 
		states[Connection.CELL_3G]  = 'Cell 3G connection'; 
		states[Connection.CELL_4G]  = 'Cell 4G connection'; 
		states[Connection.NONE]     = 'No network connection'; 

		alert('Connection type: ' + states[networkState]); 
}

</script>
</head>
<body>
	<p>A dialog box will report the network state.</p>
</body>
</html>