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  <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>用 Javascript 實現錨點(Anchor)間平滑跳轉</title> <script language="javascript"> // 說明：用 Javascript 實現錨點(Anchor)間平滑跳轉 // 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 }; } // 錨點(Anchor)間平滑跳轉 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); } </script> <style type="text/css"> div.test { width:400px; margin:5px auto; border:1px solid #ccc; } div.test strong { font-size:16px; background:#fff; border-bottom:1px solid #aaa; margin:0; display:block; padding:5px 0; text-decoration:underline; color:#059B9A; cursor:pointer; } div.test p { height:400px; background:#f1f1f1; margin:0; } </style> </head> <body> <form id="form1" runat="server"> <div id="0kkqlfz" class="test"> <a name="header_1" id="header_1"></a> <strong onclick="javascript:scroller('header_4', 800);">header_1 --> header_4</strong><p></p> </div> <div id="0kkqlfz" class="test"> <a name="header_2" id="header_2"></a> <strong onclick="javascript:scroller('header_5', 800);">header_2 --> header_5</strong><p></p> </div> <div id="0kkqlfz" class="test"> <a name="header_3" id="header_3"></a> <strong onclick="javascript:scroller('header_6', 800);">header_3 --> header_6</strong><p></p> </div> <div id="0kkqlfz" class="test"> <a name="header_4" id="header_4"></a> <strong onclick="javascript:scroller('header_7', 800);">header_4 --> header_7</strong><p></p> </div> <div id="0kkqlfz" class="test"> <a name="header_5" id="header_5"></a> <strong onclick="javascript:scroller('header_3', 800);">header_5 --> header_3</strong><p></p> </div> <div id="0kkqlfz" class="test"> <a name="header_6" id="header_6"></a> <strong onclick="javascript:scroller('header_2', 800);">header_6 --> header_2</strong><p></p> </div> <div id="0kkqlfz" class="test"> <a name="header_7" id="header_7"></a> <strong onclick="javascript:scroller('header_1', 800);">header_7 --> header_1</strong><p></p> </div> </form> </body> </html>

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