JavaScript Tutorial/Event/Event Parameter
Версия от 18:52, 25 мая 2010; (обсуждение)
Содержание
Get event Phase: CAPTURING,BUBBLING
<html>
<head>
<title>W3C DOM Event Propagation</title>
<script type="text/javascript">
function getPhase(evt) {
switch (evt.eventPhase) {
case 1:
return "CAPTURING";
break;
case 2:
return "AT TARGET";
break;
case 3:
return "BUBBLING";
break;
default:
return "";
}
}
</script>
</head>
<body onload="init()">
<form>
<input type="button" value="Button "main1"" name="main1" onclick="alert("button (" + getPhase(event) + ").")" />
</form>
</body>
</html>
Pass key event as the function parameter
<html>
<head>
<title>Key Events Example</title>
<script type="text/javascript">
function handleEvent(oEvent) {
var oTextbox = document.getElementById("txt1");
oTextbox.value += "\n>" + oEvent.type;
}
</script>
</head>
<body>
<P>Type some characters into the first textbox.</p>
<P><textarea id="txtInput" rows="15" cols="50"
onkeydown="handleEvent(event)"
onkeyup="handleEvent(event)"
onkeypress="handleEvent(event)"></textarea></p>
<P><textarea id="txt1" rows="15" cols="50"></textarea></p>
</body>
</html>
Use mouse event as the function parameter
<html>
<head>
<title>Mouse Events Example</title>
<script type="text/javascript">
function handleEvent(oEvent) {
var oTextbox = document.getElementById("txt1");
oTextbox.value += "\n" + oEvent.type;
}
</script>
</head>
<body>
<P>Use your mouse to click and double click the red square.</p>
<div style="width: 100px; height: 100px; background-color: red"
onclick="handleEvent(event)"
id="div1"></div>
<P><textarea id="txt1" rows="15" cols="50"></textarea></p>
</body>
</html>
X/Y Marks the Spot for a popup window (IE)
<html>
<head>
<title>X/Y Marks the Spot</title>
<script type="text/javascript">
function mouseDown() {
var locString = "X = " + window.event.screenX + " Y = " + window.event.screenY;
document.write(locString);
}
document.onmousedown=mouseDown;
</script>
</head>
<body>
</body>
</html>