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  <!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>網頁特效-綜合特效-個性的頁面頂部和底部切換效果</title> <meta http-equiv="content-type" content="text/html;charset=gb2312">  <style type="text/css"> body{background:#1a3265 url(about:blank) no-repeat fixed;padding:0px;margin:0px;cursor:default;} /*靜止菜單*/ #fixedMenu{width:80px;height:66px;position:fixed;z-index:29;bottom:0;right:0;background:transparent url(http://www.zzsky.cn/effect/images/201101151030/twitter.png) 0 0;} </style>  <script type="text/javascript"> function $(t){return _.getElementById(t);} /* 平滑跳轉到錨點處理塊 */ // 轉換為數字 function intval(v){ v = parseInt(v); return isNaN(v) ? 0 : v; } // 獲取元素信息 function getPos(e){ var l = 0; var t = 0; var w = intval(e.style.width); var h = intval(e.style.height); var wb = e.offsetWidth; var hb = e.offsetHeight; while (e.offsetParent){ l += e.offsetLeft + (e.currentStyle?intval(e.currentStyle.borderLeftWidth):0); t += e.offsetTop + (e.currentStyle?intval(e.currentStyle.borderTopWidth):0); e = e.offsetParent; } l += e.offsetLeft + (e.currentStyle?intval(e.currentStyle.borderLeftWidth):0); t += e.offsetTop + (e.currentStyle?intval(e.currentStyle.borderTopWidth):0); return {x:l, y:t, w:w, h:h, wb:wb, hb:hb}; } // 獲取滾動條信息 function getScroll() { var t, l, w, h; if (document.documentElement && document.documentElement.scrollTop) { t = document.documentElement.scrollTop; l = document.documentElement.scrollLeft; w = document.documentElement.scrollWidth; h = document.documentElement.scrollHeight; } else if (document.body) { t = document.body.scrollTop; l = document.body.scrollLeft; w = document.body.scrollWidth; h = document.body.scrollHeight; } return { t: t, l: l, w: w, h: h }; } // 跳轉 function scroller(el, duration){ if(typeof el != 'object') { el = document.getElementById(el); } if(!el) return; var z = this; z.el = el; z.p = getPos(el); z.s = getScroll(); z.clear = function(){window.clearInterval(z.timer);z.timer=null}; z.t=(new Date).getTime(); z.step = function(){ var t = (new Date).getTime(); var p = (t - z.t) / duration; if (t >= duration + z.t) { z.clear(); window.setTimeout(function(){z.scroll(z.p.y, z.p.x)},13); } else { st = ((-Math.cos(p*Math.PI)/2) + 0.5) * (z.p.y-z.s.t) + z.s.t; sl = ((-Math.cos(p*Math.PI)/2) + 0.5) * (z.p.x-z.s.l) + z.s.l; z.scroll(st, sl); } }; z.scroll = function (t, l){window.scrollTo(l, t)}; z.timer = window.setInterval(function(){z.step();},13); } /** 全局變量聲明 */ var _ = document; //綁定頁面加載完成事件調用函數 function addLoadEvent(func) { var oldonload = window.onload; if (typeof window.onload != 'function') { window.onload = func; } else { window.onload = function() { if (oldonload) { oldonload(); } func(); } } } addLoadEvent(function() { //靜止按鈕 if(t=$('fixedMenu')){ t.style.cursor = 'pointer'; t.title = '本鳥只可遠觀不可褻玩焉...'; x=2; t.onclick = function (){ if (document.documentElement && document.documentElement.scrollTop) { st = document.documentElement.scrollTop; } else if (document.body) { st = document.body.scrollTop; } if(st<x){ scroller('footer',800); }else{ scroller('header',800); } } t.onmouseover = function (){ this.style.backgroundPosition='0 -66px'; } t.onmouseout = function (){ this.style.backgroundPosition='0 0'; } } }); </script> </head> <body>  <div class="lm1jjf5" id="header" style="color:#ffffff;">這里是頁面頂部</div> <div class="xjptttr" id="content" style="height:2000px;"></div> <div class="qvpfich" id="footer" style="color:#ffffff;">這里是頁面底部</div> <div class="nl344ol" id="fixedMenu"></div> </body> </html>

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