仿土豆网首页效果, 焦点图片切换效果
<!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" /><title>byzuo.cn---焦点图片 </title><style type="text/css">/* 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(http://www.byzuo.cn/demo/focus_change/img/icon_arrow.gif) no-repeat 37px 8px;}#focus_change_btn .current img { border-color:#EEE; }</style><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.onmouseover = function() {moveElement('focus_change_list',0,0,5);classNormal()focusBtnList.className='current'}focusBtnList.onmouseover = function() {moveElement('focus_change_list',-450,0,5);classNormal()focusBtnList.className='current'}focusBtnList.onmouseover = function() {moveElement('focus_change_list',-900,0,5);classNormal()focusBtnList.className='current'}focusBtnList.onmouseover = function() {moveElement('focus_change_list',-1350,0,5);classNormal()focusBtnList.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.className='current'}if (currentNum==1 ){moveElement('focus_change_list',-900,0,5);classNormal()focusBtnList.className='current'}if (currentNum==2 ){moveElement('focus_change_list',-1350,0,5);classNormal()focusBtnList.className='current'}if (currentNum==3 ){moveElement('focus_change_list',0,0,5);classNormal()focusBtnList.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="http://www.byzuo.cn/demo/focus_change/img/01.jpg" alt="" /></li><li><img src="http://www.byzuo.cn/demo/focus_change/img/02.jpg" alt="" /></li><li><img src="http://www.byzuo.cn/demo/focus_change/img/03.jpg" alt="" /></li><li><img src="http://www.byzuo.cn/demo/focus_change/img/04.jpg" alt="" /></li></ul></div><div class="focus_change_opacity"></div><div id="focus_change_btn"><ul><li class="current"><a href="#"><img src="http://www.byzuo.cn/demo/focus_change/img/btn_01.jpg" alt="" /></a></li><li><a href="#"><img src="http://www.byzuo.cn/demo/focus_change/img/btn_02.jpg" alt="" /></a></li><li><a href="#"><img src="http://www.byzuo.cn/demo/focus_change/img/btn_03.jpg" alt="" /></a></li><li><a href="#"><img src="http://www.byzuo.cn/demo/focus_change/img/btn_04.jpg" alt="" /></a></li></ul></div></div><!--focus_change end--></body></html> 1.对焦点图片下方进行透明处理.兼容ie6 ie7 ff透明效果2.通过鼠标移动到不同的四小图片时,通过改变图片所处父节点id=focus_change_list的left值取得效果
3.默认下每5秒执行一次函数autoFocusChange(),来实现图片自动变换
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