船长 发表于 2009-05-08 10:35 | 分类：javascript | 阅读数：724 次
js圆角效果，给div添加圆角效果，多种样式可定制，运行代码查看
<!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>JavaScript 圆角效果</title> <style type="text/css"> #shadowed-border { padding: 20px; width: 30%; margin: 20px auto; } #shadowed-border .sb-inner { background:#ccc; } #shadowed-border .sb-border { background:#fff; } #shadowed-border2 { padding: 10px; width: 30%; margin: 10px auto; } #shadowed-border2 .sb-inner { background:#DFE2FF; } #shadowed-border2 .sb-border { background:#FFDC9F; } .plain { padding: 10px; width: 30%; margin: 10px auto; border: thin solid black; } </style> <script> var RUZEE = window.RUZEE || {}; RUZEE.ShadedBorder = { create: function(opts) { var isie = /msie/i.test(navigator.userAgent) && !window.opera; function sty(el, h) { for(k in h) { if (/ie_/.test(k)) { if (isie) el.style[k.substr(3)]=h[k]; } else el.style[k]=h[k]; } } function crdiv(h) { var el=document.createElement("div"); el.className = "sb-gen"; sty(el, h); return el; } function op(v) { v = v<0 ? 0 : v; v = v>0.99999 ? 0.99999 : v; if (isie) { return " filter:alpha(opacity=" + (v*100) + ");"; } else { return " opacity:" + v + ';'; } } var sr = opts.shadow || 0; var r = opts.corner || 0; var bor = 0; var bow = opts.border || 0; var shadow = sr != 0; var lw = r > sr ? r : sr; var rw = lw; var th = lw; var bh = lw; if (bow > 0) { bor = r; r = r - bow; } var cx = r != 0 && shadow ? Math.round(lw/3) : 0; var cy = cx; var cs = Math.round(cx/2); var iclass = r > 0 ? "sb-inner" : "sb-shadow"; var sclass = "sb-shadow"; var bclass = "sb-border"; var edges = opts.edges || "trlb"; if (!/t/i.test(edges)) th=0; if (!/b/i.test(edges)) bh=0; if (!/l/i.test(edges)) lw=0; if (!/r/i.test(edges)) rw=0; var p = { position:"absolute", left:"0", top:"0", width:lw + "px", height:th + "px", ie_fontSize:"1px", overflow:"hidden" }; var tl = crdiv(p); delete p.left; p.right="0"; p.width=rw + "px"; var tr = crdiv(p); delete p.top; p.bottom="0"; p.height=bh + "px"; var br = crdiv(p); delete p.right; p.left="0"; p.width=lw + "px"; var bl = crdiv(p); var tw = crdiv({ position:"absolute", width:"100%", height:th + "px", ie_fontSize:"1px", top:"0", left:"0", overflow:"hidden" }); var t = crdiv({ position:"relative", height:th + "px", ie_fontSize:"1px", marginLeft:lw + "px", marginRight:rw + "px", overflow:"hidden" }); tw.appendChild(t); var bw = crdiv({ position:"absolute", left:"0", bottom:"0", width:"100%", height:bh + "px", ie_fontSize:"1px", overflow:"hidden" }); var b = crdiv({ position:"relative", height:bh + "px", ie_fontSize:"1px", marginLeft:lw + "px", marginRight:rw + "px", overflow:"hidden" }); bw.appendChild(b); var mw = crdiv({ position:"absolute", top:(-bh)+"px", left:"0", width:"100%", height:"100%", overflow:"hidden", ie_fontSize:"1px" }); function corner(el,t,l) { var w = l ? lw : rw; var h = t ? th : bh; var s = t ? cs : -cs; var dsb = []; var dsi = []; var dss = []; var xp=0; var xd=1; if (l) { xp=w-1; xd=-1; } for (var x=0; x<w; ++x) { var yp=0; var yd=1; if (t) { yp=h-1; yd=-1; } for (var y=0; y<h; ++y) { var div = '<div style="position:absolute; top:' + yp + 'px; left:' + xp + 'px; ' + 'width:1px; height:1px; overflow:hidden;'; var xc = x - cx; var yc = y - cy - s; var d = Math.sqrt(xc*xc+yc*yc); var doShadow = false; if (r > 0) { // draw border if (xc < 0 && yc < bor && yc >= r || yc < 0 && xc < bor && xc >= r) { dsb.push(div + '" class="' + bclass + '"></div>'); } else if (d<bor && d>=r-1 && xc>=0 && yc>=0) { var dd = div; if (d>=bor-1) { dd += op(bor-d); doShadow = true; } dsb.push(dd + '" class="' + bclass + '"></div>'); } // draw inner var dd = div + ' z-index:2;'; if (xc < 0 && yc < r || yc < 0 && xc < r) { dsi.push(dd + '" class="' + iclass + '"></div>'); } else if (d<r && xc>=0 && yc>=0) { if (d>=r-1) { dd += op(r-d); doShadow = true; } dsi.push(dd + '" class="' + iclass + '"></div>'); } else doShadow = true; } else doShadow = true; // draw shadow if (sr > 0 && doShadow) { d = Math.sqrt(x*x+y*y); if (d<sr) { dss.push(div + ' z-index:0; ' + op(1-(d/sr)) + '" class="' + sclass + '"></div>'); } } yp += yd; } xp += xd; } el.innerHTML = dss.concat(dsb.concat(dsi)).join(''); } function mid(mw) { var ds = []; ds.push('<div style="position:relative; top:' + (th+bh) + 'px;' + ' height:10000px; margin-left:' + (lw-r-cx) + 'px;' + ' margin-right:' + (rw-r-cx) + 'px; overflow:hidden;"' + ' class="' + iclass + '"></div>'); var dd = '<div style="position:absolute; width:1px;' + ' top:' + (th+bh) + 'px; height:10000px;'; for (var x=0; x<lw-r-cx; ++x) { ds.push(dd + ' left:' + x + 'px;' + op((x+1.0)/lw) + '" class="' + sclass + '"></div>'); } for (var x=0; x<rw-r-cx; ++x) { ds.push(dd + ' right:' + x + 'px;' + op((x+1.0)/rw) + '" class="' + sclass + '"></div>'); } if (bow > 0) { var su = ' width:' + bow + 'px;' + '" class="' + bclass + '"></div>'; ds.push(dd + ' left:' + (lw-bor-cx) + 'px;' + su); ds.push(dd + ' right:' + (rw-bor-cx) + 'px;' + su); } mw.innerHTML = ds.join(''); } function tb(el, t) { var ds = []; var h = t ? th : bh; var dd = '<div style="height:1px; overflow:hidden; position:absolute;' + ' width:100%; left:0px; '; var s = t ? cs : -cs; for (var y=0; y<h-s-cy-r; ++y) { ds.push(dd + (t ? 'top:' : 'bottom:') + y + 'px;' + op((y+1)*1.0/h) + '" class="' + sclass + '"></div>'); } if (y >= bow) { ds.push(dd + (t ? 'top:' : 'bottom:') + (y - bow) + 'px;' + ' height:' + bow + 'px;" class="' + bclass + '"></div>'); } ds.push(dd + (t ? 'top:' : 'bottom:') + y + 'px;' + ' height:' + (r+cy+s) + 'px;" class="' + iclass + '"></div>'); el.innerHTML = ds.join(''); } corner(tl, true, true); corner(tr, true, false); corner(bl, false, true); corner(br, false, false); mid(mw); tb(t, true); tb(b, false); return { render: function(el) { if (typeof el == 'string') el = document.getElementById(el); if (el.length != undefined) { for (var i=0; i<el.length; ++i) this.render(el[i]); return; } // remove generated children var node = el.firstChild; while (node) { var nextNode = node.nextSibling; if (node.nodeType == 1 && node.className == 'sb-gen') el.removeChild(node); node = nextNode; } var iel = el.firstChild; var twc = tw.cloneNode(true); var mwc = mw.cloneNode(true); var bwc = bw.cloneNode(true); el.insertBefore(tl.cloneNode(true), iel); el.insertBefore(tr.cloneNode(true), iel); el.insertBefore(bl.cloneNode(true), iel); el.insertBefore(br.cloneNode(true), iel); el.insertBefore(twc, iel); el.insertBefore(mwc, iel); el.insertBefore(bwc, iel); if (isie) { function resize() { twc.style.width = bwc.style.width = mwc.style.width = el.offsetWidth + "px"; mwc.firstChild.style.height = el.offsetHeight + "px"; } el.onresize=resize; resize(); } } }; } } // add our styles to the document document.write( '<style type="text/css">' + '.sb, .sbi, .sb *, .sbi * { position:relative; z-index:1; }' + '* html .sb, * html .sb *, * html .sbi, * html .sbi * { height:1%; }' + '.sbi { display:inline-block; }' + '.sb-inner { background:#ddd; }' + '.sb-shadow { background:#000; }' + '.sb-border { background:#bbb; }' + '</style>' ); // Multiple onload function created by: Simon Willison // http://simonwillison.net/2004/May/26/addLoadEvent/ 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() { border.render('shadowed-border'); border.render('shadowed-border2'); }); var border = RUZEE.ShadedBorder.create({ corner: 8, shadow: 16, border: 2 }); </script> </head> <body> <div id="shadowed-border" class="sb"> <p>Ma quande lingues coalesce, lingue es plu simplic regulari quam ti del coalescent lingues. Li nov lingua franca va esser plu simplic e regulari quam li existent Europan lingues.</p> </div> <div id="shadowed-border2" class="sb"> <p>Ma quande lingues coalesce, lingue es plu simplic regulari quam ti del coalescent lingues. Li nov lingua franca va esser plu simplic e regulari quam li existent Europan lingues.</p> </div> <div class="plain"> <p> <em>Note: This is plain, without the script.</em> Lorem ipsum dolor sit amet, consecte adipiscing elit.</p> </div> <div style="text-align:center;">代码整理：<a href="http://www.songlecn.com">web集结号-http://www.songlecn.com</a></div> <body></html>
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