数字时钟 digital_clock.html
参考书:[ JavaScript 权威指南 E6] 第13章
<!DOCTYPE html> <!-- This is an HTML5 file -->
<html> <!-- The root element -->
<head> <!-- Title, scripts & styles go here -->
<title>Digital Clock</title>
<script> // A script of js code
// Define a function to display the current time
function displayTime() {
var elt = document.getElementById("clock"); // Find element with id="clock"
var now = new Date(); // Get current time
elt.innerHTML = now.toLocaleTimeString(); // Make elt display it
setTimeout(displayTime, 1000); // Run again in 1 second
}
window.onload = displayTime; // Start displaying the time when document loads.
</script>
<style> /* A CSS stylesheet for the clock */
#clock { /* Style apply to element with id="clock" */
font: bold 24pt sans; /* Use a big bold font */
background: #ddf; /* On a light bluish-gray background */
padding: 10px; /* Surround it with some space */
border: solid black 2px; /* And a solid black border */
border-radius: 10px; /* Round the corners (where supported) */
}
</style>
</head>
<body> <!-- The body is the displayed parts of the doc. -->
<h1>Digital Clock</h1> <!-- Display a title -->
<span id="clock"></span> <!-- The time gets inserted here -->
</body>
</html>
参考书:[ JavaScript 权威指南 E6] 第13章
