script08.js

来自「图灵程序设计丛书 JavaScript基础教程源代码」· JavaScript 代码 · 共 29 行

window.onload = initBannerLink;

var adImages = new Array("images/banner1.gif","images/banner2.gif","images/banner3.gif");
var adURL = new Array("negrino.com","sun.com","microsoft.com");
var thisAd = 0;

function rotate() {
	thisAd++;
	if (thisAd == adImages.length) {
		thisAd = 0;
	}
	document.getElementById("adBanner").src = adImages[thisAd];

	setTimeout("rotate()", 3 * 1000);
}

function newLocation() {
	document.location.href = "http://www." + adURL[thisAd];
	return false;
}

function initBannerLink() {
	if (document.getElementById("adBanner").parentNode.tagName == "A") {
		document.getElementById("adBanner").parentNode.onclick = newLocation;
	}
	
	rotate();
}