本文实例讲述了js实现百度联盟中一款不错的图片切换效果的方法。分享给大家供大家参考。具体实现方法如下:
<html> <title>js实现百度联盟中的一个不错的图片切换效果</title> <body> <script> var links = new Array(); links[1] = "http://www.baidu.com/"; links[2] = "/"; links[3] = "http://www.sohu.com/"; links[4] = "http://sc.jb51.net/"; var imgs = new Array(); for(var n = 1; n <= 5; n++) imgs[n] = new Image(); imgs[1].src = "images/m01.jpg"; imgs[2].src = "images/m02.jpg"; imgs[3].src = "images/m03.jpg"; imgs[4].src = "images/m04.jpg"; var tits = new Array(); tits[1] ="百度搜索"; tits[2] = "菜鸟教程(cainiaojc.com)"; tits[3] = "搜狐主页"; tits[4] = "素材之家"; var imgwidth = 550;//图片宽度 var imgheight = 134;//图片宽度 var str = "<style type='text/css'>"; str += "#imgnv{display:none;position:absolute;bottom:-1px;right:0;height:16px;}#imgnv div{float:left;margin-right:1px;}"; str += "#imgnv div.on,#imgnv div.off{margin-bottom:1px;width:30px;height:15px;line-height:18px!important;line-height:15px;font-size:9px;text-align:center;cursor:pointer;cursor:hand}"; str += "#imgnv div.on{background:#CE0609;color:#FFF;font-weight:bold}"; str += "#imgnv div.off{background:#323232;color:#FFF;text-decoration:none}"; str += "#titnv{margin-top:3px;color:#000;text-align:center;display:none;}"; str += "</style>"; str += "<div style='position:relative'>"; str += "<div><a id='dlink' href='" + links[1] + "' target='_blank'><img id='dimg' src='" + imgs[1].src + "' border='0' width='" + imgwidth + "' height='"+imgheight+"' style='filter:Alpha(opacity=100)' onmouseover='Pause(true)' onmouseout='Pause(false)'></a></div>"; //修改点1:循环添加内层div内容以增加个数 str += "<div id='imgnv'><div id='it1' class='on' onmouseover='ImgSwitch(1, true)' onmouseout='Pause(false)'>1</div><div id='it2' class='off' onmouseover='ImgSwitch(2, true)' onmouseout='Pause(false)'>2</div><div id='it3' class='on' onmouseover='ImgSwitch(3, true)' onmouseout='Pause(false)'>3</div><div id='it4' class='off' onmouseover='ImgSwitch(4, true)' onmouseout='Pause(false)'>4</div></div>"; str += "<div id='titnv'><b>" + tits[1] + "</b></div>"; str += "</div>"; document.write(str); var oi = document.getElementById("dimg"); var pause = false; var curid = 1; var lastid = 1; var sw = 1; var opacity = 100; var speed = 15; var delay = (document.all)? 400:700; function SetAlpha(){ if(document.all){ if(oi.filters && oi.filters.Alpha) oi.filters.Alpha.opacity = opacity; }else{ oi.style.MozOpacity = ((opacity >= 100)? 99:opacity) / 100; } } function ImgSwitch(id, p){ if(p){ pause = true; opacity = 100; SetAlpha(); } oi.src = imgs[id].src; document.getElementById("dlink").href = links[id]; document.getElementById("it" + lastid).className = "off"; document.getElementById("it" + id).className = "on"; document.getElementById("titnv").innerHTML = "<b>" + tits[id] + "</b>"; curid = lastid = id; } function ScrollImg(){ if(pause && opacity >= 100) return; if(sw == 0){ opacity += 2; if(opacity > delay){ opacity = 100; sw = 1; } } if(sw == 1){ opacity -= 3; if(opacity < 10){ opacity = 10; sw = 3; } } SetAlpha(); if(sw != 3) return; sw = 0; curid++; //修改点2:这里的4也是个数 if(curid > 4) curid = 1; ImgSwitch(curid, false); } function Pause(s){ pause = s; } function StartScroll(){ setInterval(ScrollImg, speed); } function CheckLoad(){ if (imgs[1].complete == true && imgs[2].complete == true) { clearInterval(checkid); setTimeout(StartScroll, 2000); } } var checkid = setInterval(CheckLoad, 10); </script> </body> </html>
希望本文所述对大家的javascript程序设计有所帮助。
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