Prototype - observe() Method
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This method registers an event handler on element and returns element.
Syntax
element.observe(eventName, handler[, useCapture = false]);
Return Value
An HTML element.
Example
<html>
<head>
<title>Prototype examples</title>
<script type = "text/javascript" src = "/javascript/prototype.js"></script>
<script>
function RegisterFunction() {
$('test').observe('click', function(event) {
alert(Event.element(event).innerHTML);
});
}
</script>
</head>
<body onload = "RegisterFunction();">
<p id = "test">Click me to see the result.</p>
</body>
</html>
Output
prototype_element_object.htm
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