Definition:
The alert() method displays an alert box with a specified message and an OK button.
Syntax:
alert(your message)
you can give any appropriate message.
Example:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Alert Box Example</title>
<script type="text/javascript" language="javascript">
function show()
{
alert("Hello World!");
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input type="button" id="alertshow" name="alertshow" onclick="show();" value="Alert Box" />
</div>
</form>
</body>
</html>
Output:
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