/**
 * RUZEE.ShadedBorder 0.6.2
 * (c) 2006 Steffen Rusitschka
 *
 * RUZEE.ShadedBorder is freely distributable under the terms of an MIT-style license.
 * For details, see http://www.ruzee.com/
 */

var RUZEE = window.RUZEE || {};

RUZEE.ShadedBorder = {

create: function(opts) {
 var isie = /msie/i.test(navigator.userAgent) && !window.opera;
 var isie6 = isie && !window.XMLHttpRequest;
 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;
 if (v>0.99999) return "";
 return isie ? " filter:alpha(opacity=" + (v*100) + ");" : " opacity:" + v + ';';
 }

 var sr = opts.shadow || 0;
 var r = opts.corner || 0;
 var bor = 0;
 var bow = opts.border || 0;
 var boo = opts.borderOpacity || 1;
 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", margin:"0", padding:"0" }; 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", margin:"0", padding:"0" });
 var t = crdiv({ position:"relative", height:th + "px", ie_fontSize:"1px",
 margin:"0 "+ rw + "px 0 " + lw + "px", overflow:"hidden", padding:"0" });
 tw.appendChild(t);

 var bw = crdiv({ position:"absolute", left:"0", bottom:"0", width:"100%", height:bh + "px",
 ie_fontSize:"1px", overflow:"hidden", margin:"0", padding:"0" });

 var b = crdiv({ position:"relative", height:bh + "px", ie_fontSize:"1px",
 margin:"0 "+ rw + "px 0 " + lw + "px", overflow:"hidden", padding:"0" });

 bw.appendChild(b);

 var mw = crdiv({ position:"absolute", top:(-bh)+"px", left:"0", width:"100%", height:"100%",
 overflow:"hidden", ie_fontSize:"1px", padding:"0", margin:"0" });

 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=h-1; var yd=-1; if (t) { yp=0; yd=1; }
 var finished=false;
 for (var y=h-1; y>=0 && !finished; --y) {
 var div = '<div style="position:absolute; top:' + yp + 'px; left:' + xp + 'px; ' +
 'width:1px; height:1px; overflow:hidden; margin:0; padding:0;';

 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 + op(boo) + '" 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)*boo);
 doShadow = true;
 } else dd += op(boo);
 dsb.push(dd + '" class="' + bclass + '"></div>');
 }

 // draw inner
 var dd = div + ' z-index:2;' + (t ? 'background-position:0 -' + (r-yc-1) + 'px;' : 'background-image:none;');
 var finish = function() {
 if (!t) dd = dd.replace(/top\:\d+px/, "top:0px");
 dd = dd.replace(/height\:1px/, "height:" + (y+1) + "px");
 dsi.push(dd + '" class="' + iclass + '"></div>');
 finished = true;
 };
 if (xc < 0 && yc < r || yc < 0 && xc < r) {
 finish();
 } 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 {
 finish();
 }
 } 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:2048px; ' +
 ' margin:0 ' + (rw-r-cx) + 'px 0 ' + (lw-r-cx) + 'px; ' +
 ' padding:0; overflow:hidden;' +
 ' background-position:0 ' + (th > 0 ? -(r+cy+cs) : '0') + 'px;"' +
 ' class="' + iclass + '"></div>');

 var dd = '<div style="position:absolute; width:1px;' +
 ' top:' + (th+bh) + 'px; height:2048px; padding:0; margin:0;';
 if (sr>0) {
 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;' + op(boo) + '" 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; margin:0; padding:0;' +
 ' width:100%; left:0px; ';
 var s = t ? cs : -cs;
 for (var y=0; y<h-s-cy-r; ++y) {
 if (sr>0) 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;' + op(boo) +
 ' height:' + bow + 'px;" class="' + bclass + '"></div>');
 }

 ds.push(dd + (t ? 'background-position-y:0; top:' :
 'background-image:none; 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);
 needsCloning = 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;
 }
 el.className += " sb";
 sty(el, { position:"relative", background:"transparent" });

 // 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 = needsCloning ? tw.cloneNode(true) : tw;
 var mwc = needsCloning ? mw.cloneNode(true) : mw;
 var bwc = needsCloning ? bw.cloneNode(true) : bw;
 var tlc = needsCloning ? tl.cloneNode(true) : tl;
 var trc = needsCloning ? tr.cloneNode(true) : tr;
 var blc = needsCloning ? bl.cloneNode(true) : bl;
 var brc = needsCloning ? br.cloneNode(true) : br;

 el.insertBefore(tlc, iel); el.insertBefore(trc, iel);
 el.insertBefore(blc, iel); el.insertBefore(brc, iel);
 el.insertBefore(twc, iel); el.insertBefore(mwc, iel);
 el.insertBefore(bwc, iel);

 if (isie6) {
 el.onmouseover=function() { this.className += " hover"; }
 el.onmouseout=function() { this.className = this.className.replace(/ hover/,""); }
 }
 if (isie) {
 function resize() {
 twc.style.width = bwc.style.width = mwc.style.width = el.offsetWidth + "px";
 if (isie6) {
 mwc.firstChild.style.height = el.offsetHeight + "px";
 } else {
 for (var i=0; i<mwc.childNodes.length; ++i) {
 mwc.childNodes[i].style.height = (el.offsetHeight - bh - th) + "px";
 }
 }
 trc.style.right = brc.style.right = null;
 trc.style.left = brc.style.left = (el.offsetWidth - rw) + "px";
 }
 el.onresize=resize;
 resize();
 }
 needsCloning = true;
 }
 };
}
}

// add our styles to the document
document.write('\
 <style type="text/css">\
 .sb, .sbi, .sb *, .sbi * { position:relative; z-index:1; }\
 * html .sb, * html .sbi { height:1%; }\
 .sbi { display:inline-block; }\
 .sb-inner { background:#ddd; }\
 .sb-shadow { background:#000; }\
 .sb-border { background:#bbb; }\
 </style>\
');