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土豆网首页轮换图片特效代码

http://www.itjxue.com 2015-08-05 00:16 来源:未知 点击次数:

仿土豆网的焦点轮换图片：

1.对焦点图片下方进行透明处理
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效果
4.当鼠标移到图片上时停止滚动
5.此效果兼容浏览器ie6、ie7、FF2.0、F3.0、opera9.5
学JS不长,个人能力有限,只是试着写,有不好的地方大家请指正....

<!DOCTYPE <a href='http://www.itjxue.com/plus/search.php?kwtype=0&keyword=html&' target='_blank'><u>html</u></a> 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>仿土豆网的焦点轮换图片</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(/uploadfile/200901/1/6C164133877.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[i].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); var atuokey = false; function autoFocusChange() { $('focus_change').onmouseover = function(){atuokey = true} $('focus_change').onmouseout = function(){atuokey = false} if(atuokey) return; var focusBtnList = $('focus_change_btn').getElementsByTagName('li'); for(var i=0; i<focusBtnList.length; i++) { if (focusBtnList[i].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><a href="http://www.itjxue.com/"><img src="http://www.itjxue.com/files/090207/1_213935.jpg" alt="" /></a></li> <li><a href="http://www.itjxue.com/"><img src="http://www.itjxue.com/files/090207/1_213944.jpg" alt="" /></a></li> <li><a href="http://www.itjxue.com/"><img src="http://www.itjxue.com/files/090207/1_213952.jpg" alt="" /></a></li> <li><a href="http://www.itjxue.com/"><img src="http://www.itjxue.com/files/090207/1_214001.jpg" alt="" /></a></li> </ul> </div> <div class="focus_change_opacity"></div> <div id="focus_change_btn"> <ul> <li class="current"><a href="#"><img src="http://www.itjxue.com/files/090207/1_214008.jpg" alt="" /></a></li> <li><a href="#"><img src="http://www.itjxue.com/files/090207/1_214016.jpg" alt="" /></a></li> <li><a href="#"><img src="http://www.itjxue.com/files/090207/1_214024.jpg" alt="" /></a></li> <li><a href="#"><img src="http://www.itjxue.com/files/090207/1_214032.jpg" alt="" /></a></li> </ul> </div> </div> <div style="height:20px; background:#EEE;"></div> </body> </html>

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