代码简介：
真正的JavaScript鼠标放上加载大图的效果，唯一不爽的地方是没有Loading，在淘宝网的商品列表中有这样的效果，有些朋友很想要的效果，但是却不知该如何形容，本放大还带有渐入渐出动画，如果不想要的话，可以去掉哦，这样代码就更精简了。
代码内容：
View Code <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>JavaScript实现鼠标放上动画加载大图的代码_网页代码站(www.webdm.cn)</title>
<style>
*{ padding:0; margin:0;} html { overflow:-moz-scrollbars-vertical; } body{ word-break:break-all; text-align:left; background:#C0C0C0; color:#4E4E4E;} ul,li{ list-style:none;} a{ color:#333; text-decoration:none;} a:hover{ color:#ff722d; text-decoration:none;} img{ border:0;} a img,a:hover img{ border:0;} .latestWeb{ width:560px; margin:10px auto 0;} .latestWeb ul{ overflow:hidden; _height:1%;} .latestWeb li{ float:left; border:1px solid #EBEAEA; width:150px; padding:17px 0 14px 22px; margin:14px 18px 0 0; } .trans_msg
{
filter:alpha(opacity=100,enabled=1) revealTrans(duration=.2,transition=1) blendtrans(duration=.2); } div.bodycontent{font-family:Arial, Helvetica, sans-serif;padding:0 10px 10px 13px;color:#555;line-height:22px;text-align:justify;text-justify:inter-ideograph;} div.bodycontent ul{margin-left:0px}
</style>
<script language="javascript">
function toolTip(str) {
}
</script>
</head>
<body>
<div class="latestWeb">
<ul>
<li>
<div><a href="http://www.webdm.cn"><img src='http://www.webdm.cn/images/wall1_s.jpg' onMouseOver="toolTip('<img src=http://www.webdm.cn/images/wall1.jpg>')"
onMouseOut="toolTip()"></a></div>
</li>
<li>
<div><a href="http://www.webdm.cn"><img src='http://www.webdm.cn/images/wall2_s.jpg' onMouseOver="toolTip('<img src=http://www.webdm.cn/images/wall2.jpg>')"
onMouseOut="toolTip()"></a></div>
</li>
</ul>
</div>
<script language="javascript">
function getViewportHeight() {
if (window.innerHeight!=window.undefined) return window.innerHeight; if (document.compatMode=='CSS1Compat') return document.documentElement.clientHeight; if (document.body) return document.body.clientHeight; return window.undefined; }
function getViewportWidth() {
if (window.innerWidth!=window.undefined) return window.innerWidth; if (document.compatMode=='CSS1Compat') return document.documentElement.clientWidth; if (document.body) return document.body.clientWidth; return window.undefined; }
function getScrollTop() {
if (self.pageYOffset)
{
return self.pageYOffset; }
else if (document.documentElement && document.documentElement.scrollTop)
{
return document.documentElement.scrollTop; }
else if (document.body)
{
return document.body.scrollTop; }
}
function getScrollLeft() {
if (self.pageXOffset)
{
return self.pageXOffset; }
else if (document.documentElement && document.documentElement.scrollLeft)
{
return document.documentElement.scrollLeft; }
else if (document.body)
{
return document.body.scrollLeft; }
}
var rT=true;//允许图像过渡 var bT=true;//允许图像淡入淡出 var tw=150;//提示框宽度 var endaction=false;//结束动画 var ns4 = document.layers; var ns6 = document.getElementById && !document.all; var ie4 = document.all; offsetX = 10; offsetY = 20; var toolTipSTYLE=""; function initToolTips()
{
tempDiv = document.createElement("div"); tempDiv.id = "toolTipLayer"; tempDiv.style.position = "absolute"; tempDiv.style.display = "none"; document.body.appendChild(tempDiv); if(ns4||ns6||ie4)
{
if(ns4) toolTipSTYLE = document.toolTipLayer; else if(ns6) toolTipSTYLE = document.getElementById("toolTipLayer").style; else if(ie4) toolTipSTYLE = document.all.toolTipLayer.style; if(ns4) document.captureEvents(Event.MOUSEMOVE); else
{
toolTipSTYLE.visibility = "visible"; toolTipSTYLE.display = "none"; }
document.onmousemove = moveToMouseLoc; }
}
function toolTip(msg, fg, bg)
{
try {
if(toolTip.arguments.length < 1) // hide
{
if(ns4)
{
toolTipSTYLE.visibility = "hidden"; }
else
{
if (!endaction) {toolTipSTYLE.display = "none";} if (rT) document.all("msg1").filters[1].Apply(); if (bT) document.all("msg1").filters[2].Apply(); document.all("msg1").filters[0].opacity=0; if (rT) document.all("msg1").filters[1].Play(); if (bT) document.all("msg1").filters[2].Play(); if (rT){
if (document.all("msg1").filters[1].status==1 || document.all("msg1").filters[1].status==0){
toolTipSTYLE.display = "none";} }
if (bT){
if (document.all("msg1").filters[2].status==1 || document.all("msg1").filters[2].status==0){
toolTipSTYLE.display = "none";} }
if (!rT && !bT) toolTipSTYLE.display = "none"; }
}
else
{
if(!fg) fg = "#777777"; if(!bg) bg = "#eeeeee"; var content =
'<table id="msg1" name="msg1" border="0" cellspacing="0" cellpadding="1" bgcolor="' + fg + '" class="trans_msg"><td>' +
'<table border="1" cellspacing="2" cellpadding="3" bgcolor="' + bg +
'"><td><font face="Arial" color="' + fg +
'" size="-2">' + msg +
'</font></td></table></td></table>';
if(ns4)
{
toolTipSTYLE.document.write(content); toolTipSTYLE.document.close(); toolTipSTYLE.visibility = "visible"; }
if(ns6)
{
document.getElementById("toolTipLayer").innerHTML = content; toolTipSTYLE.display='block' }
if(ie4)
{
document.all("toolTipLayer").innerHTML=content; toolTipSTYLE.display='block' //--图象过渡，淡入处理--
var cssopaction=document.all("msg1").filters[0].opacity
document.all("msg1").filters[0].opacity=0; if (rT) document.all("msg1").filters[1].Apply(); if (bT) document.all("msg1").filters[2].Apply(); document.all("msg1").filters[0].opacity=cssopaction; if (rT) document.all("msg1").filters[1
