css代码：
代码
/* Reset style */
* { margin:0; padding:0; word-break:break-all; }
body { background:#FFF; color:#333; font:12px/1.6em Helvetica, Arial, sans-serif; }
h1, h2, h3, h4, h5, h6 { font-size:1em; }
a { color:#039; text-decoration:none; }
a:hover { text-decoration:underline; }
ul, li { list-style:none; }
fieldset, img { border:none; }
em, strong, cite, th { font-style:normal; font-weight:normal; }
/* Focus_change style */
#focus_change { position:relative; width:450px; height:295px; overflow:hidden; margin:20px 0 1px 60px; }
#focus_change_list { position:absolute; width:1800px; height:295px; }
#focus_change_list li { float:left; }
#focus_change_list li img { width:450px; height:295px; }
.focus_change_opacity { position:absolute; width:450px; height:70px; top:225px; left:0; background:#000; filter:alpha(opacity=50); -moz-opacity:0.5; opacity: 0.5; }
#focus_change_btn { position:absolute; width:450px; height:65px; top:225px; left:0; }
#focus_change_btn ul { padding-left:5px; }
#focus_change_btn li { display:inline; float:left; margin:0 15px; padding-top:12px; }
#focus_change_btn li img { width:76px; height:50px; border:2px solid #888; }
#focus_change_btn .current { background:url(/images/bg.gif) no-repeat 37px 8px;}
#focus_change_btn .current img { border-color:#EEE; }
前端代码：
代码
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link href="/css/style.css" type="text/css" rel="stylesheet">
<title>焦点图片</title>
<script type="text/javascript">
function $(id) { return document.getElementById(id); }
function moveElement(elementID, final_x, final_y, interval) {
if (!document.getElementById) return false;
if (!document.getElementById(elementID)) return false;
var elem = document.getElementById(elementID);
if (elem.movement) {
clearTimeout(elem.movement);
}
if (!elem.style.left) {
elem.style.left = "0px";
}
if (!elem.style.top) {
elem.style.top = "0px";
}
var xpos = parseInt(elem.style.left);
var ypos = parseInt(elem.style.top);
if (xpos == final_x && ypos == final_y) {
return true;
}
if (xpos < final_x) {
var dist = Math.ceil((final_x - xpos) / 10);
xpos = xpos + dist;
}
if (xpos > final_x) {
var dist = Math.ceil((xpos - final_x) / 10);
xpos = xpos - dist;
}
if (ypos < final_y) {
var dist = Math.ceil((final_y - ypos) / 10);
ypos = ypos + dist;
}
if (ypos > final_y) {
var dist = Math.ceil((ypos - final_y) / 10);
ypos = ypos - dist;
}
elem.style.left = xpos + "px";
elem.style.top = ypos + "px";
var repeat = "moveElement('" + elementID + "'," + final_x + "," + final_y + "," + interval + ")";
elem.movement = setTimeout(repeat, interval);
}
function classNormal() {
var focusBtnList = $('focus_change_btn').getElementsByTagName('li');
for (var i = 0; i < focusBtnList.length; i++) {
focusBtnList.className = '';
}
}
function focusChange() {
var focusBtnList = $('focus_change_btn').getElementsByTagName('li');
focusBtnList[0].onmouseover = function() {
moveElement('focus_change_list', 0, 0, 5);
classNormal()
focusBtnList[0].className = 'current'
}
focusBtnList[1].onmouseover = function() {
moveElement('focus_change_list', -450, 0, 5);
classNormal()
focusBtnList[1].className = 'current'
}
focusBtnList[2].onmouseover = function() {
moveElement('focus_change_list', -900, 0, 5);
classNormal()
focusBtnList[2].className = 'current'
}
focusBtnList[3].onmouseover = function() {
moveElement('focus_change_list', -1350, 0, 5);
classNormal()
focusBtnList[3].className = 'current'
}
}
setInterval('autoFocusChange()', 5000);
function autoFocusChange() {
var focusBtnList = $('focus_change_btn').getElementsByTagName('li');
for (var i = 0; i < focusBtnList.length; i++) {
if (focusBtnList.className == 'current') {
var currentNum = i;
}
}
if (currentNum == 0) {
moveElement('focus_change_list', -450, 0, 5);
classNormal()
focusBtnList[1].className = 'current'
}
if (currentNum == 1) {
moveElement('focus_change_list', -900, 0, 5);
classNormal()
focusBtnList[2].className = 'current'
}
if (currentNum == 2) {
moveElement('focus_change_list', -1350, 0, 5);
classNormal()
focusBtnList[3].className = 'current'
}
if (currentNum == 3) {
moveElement('focus_change_list', 0, 0, 5);
classNormal()
focusBtnList[0].className = 'current'
}
}
window.onload = function() {
focusChange();
}
</script>
</head>
<body>
<div id="focus_change">
<div id="focus_change_list" style="top: 0; left: 0;">
<ul>
<li>
<img src="/images/01.jpg" alt="" /></li>
<li>
<img src="/images/02.jpg" alt="" /></li>
<li>
<img src="/images/03.jpg" alt="" /></li>
<li>
<img src="/images/04.jpg" alt="" /></li>
</ul>
</div>
<div class="focus_change_opacity">
</div>
<div id="focus_change_btn">
<ul>
<li class="current"><a href="#" target="_blank">
<img src="/images/01.jpg" alt="" /></a></li>
<li><a href="#" target="_blank">
<img src="/images/02.jpg" alt="" /></a></li>
<li><a href="#" target="_blank">
<img src="/images/03.jpg" alt="" /></a></li>
<li><a href="#" target="_blank">
<img src="/images/04.jpg" alt="" /></a></li>
</ul>
</div>
</div>
<!--focus_change end-->
</body>
</html>
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