Prototype - Event isLeftClick() 方法
此方法确定与按钮相关的鼠标事件是否与"左"(实际上是主)按钮有关。
语法
Event.isLeftClick(event);
返回值
如果按下左键，则返回 true。
示例
注意 − 似乎在 MSIE 中不起作用。
<html>
<head>
<title>Prototype examples</title>
<script type = "text/javascript" src = "/javascript/prototype.js"></script>
<script>
// 注册事件"click"及相关回调。
Event.observe(document, 'click', respondToClick);
// 回调函数来处理事件。
function respondToClick(event) {
var bool = Event.isLeftClick(event);
if ( bool ) {
alert("Left button is pressed...." );
}
}
</script>
</head>
<body>
<p id = "note"> Click anywhere to see the result.</p>
<p>This example may not work in IE.</p>
<p id = "para1">This is paragraph 1</p>
<p id = "para2">This is paragraph 2</p>
<div id = "division">This is divsion.</div>
</body>
</html>
prototype_event_handling.html
