script11.js

来自「图灵程序设计丛书 JavaScript基础教程源代码」· JavaScript 代码 · 共 22 行

window.onload = choosePic;

var adImages = new Array("images/reading1.gif","images/reading2.gif","images/reading3.gif");

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

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


function choosePic() {
	thisAd = Math.floor((Math.random() * adImages.length));
	document.getElementById("adBanner").src = adImages[thisAd];
	
	rotate();
}