JS中的对象数组

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<html>

<head>

	<title>对象数组的字符串表示</title>

	<script type="text/javascript">

		function Point(x,y){

			this.x = x;

			this.y = y;

		}

		function display(arr){

			for (var i=0;i<arr.length;i++) {

				alert(arr[i].x+","+arr[i].y);

			}

		}

		//求X平均值

		function averge(arr){

			var totalx = 0;

			var totaly = 0;

			for (var i = 0;i<arr.length;i++) {

				totalx+=arr[i].x;

				totaly+=arr[i].y;

			}

			totalx = totalx/arr.length;

			totaly = totaly/arr.length;

			var pav = new Point(totalx,totaly);

			return pav;

		}

		var p1 = new Point(1,2);

		var p2 = new Point(3,4);

		var p3 = new Point(5,6);

		var points = [p1,p2,p3];

		function A() {

			//调用返回值是一个Point的对象

			var number = averge(points);

			alert(number.x+","+number.y);

		}

	</script>

</head>

<body>

<input type="text" name="name" id="name">

<input type="button" value="dian" onclick="A();">

</body>

</html>