Centring windows

Window #1
Window #2
Window #3
</> Source
<!DOCTYPE html>
<html>
<head>
	<title>Centring windows</title>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
	<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
	<link rel="stylesheet" type="text/css" href="../../../codebase/fonts/font_roboto/roboto.css"/>
	<link rel="stylesheet" type="text/css" href="../../../codebase/dhtmlx.css"/>
	<script src="../../../codebase/dhtmlx.js"></script>
	<style>
		div.controls {
			margin: 0px 10px;
			font-size: 14px;
			font-family: Tahoma;
			color: #404040;
			height: 80px;
		}
		div#winVP {
			position: relative;
			height: 650px;
			border: 1px solid #dfdfdf;
			margin: 10px;
		}
	</style>
	<script>
		var dhxWins, w1, w2, w3;

		function doOnLoad() {

			dhxWins = new dhtmlXWindows();
			dhxWins.attachViewportTo("winVP");

			w1 = dhxWins.createWindow("w1", 20, 30, 320, 200);
			w1.setText("dhtmlxWindow #1");
			w1.button("close").disable();

			w2 = dhxWins.createWindow("w2", 50, 70, 320, 200);
			w2.setText("dhtmlxWindow #2");
			w2.button("close").disable();

			w3 = dhxWins.createWindow("w3", 80, 110, 320, 200);
			w3.setText("dhtmlxWindow #3");
			w3.button("close").disable();

		}

		function centerWindow(id) {
			dhxWins.window(id).center();
		}

		function centerWindowonScreen(id) {
			dhxWins.window(id).centerOnScreen();
		}

		function doOnUnload() {
			if (dhxWins != null && dhxWins.unload != null) {
				dhxWins.unload();
				dhxWins = w1 = w2 = w3 = null;
			}
		}

	</script>
</head>
<body onload="doOnLoad();" onunload="doOnUnload();">
	<div id="winVP"></div>
	<div class="controls">
		Window #1 <input type="button" value="center on viewport" onclick="centerWindow('w1');"><input type="button" value="center on screen" onclick="centerWindowonScreen('w1');"><br>
		Window #2 <input type="button" value="center on viewport" onclick="centerWindow('w2');"><input type="button" value="center on screen" onclick="centerWindowonScreen('w2');"><br>
		Window #3 <input type="button" value="center on viewport" onclick="centerWindow('w3');"><input type="button" value="center on screen" onclick="centerWindowonScreen('w3');">
	</div>
</body>
</html>
Documentation

Check documentation to learn how to use the components and easily implement them in your applications.