//
// jq-corner.js - JQuery method for creating corner effects
//
// If this works, it was written by Dave Methvin (dave.methvin@gmail.com).
// If its broken, please fix it and send me a working copy.
//

$.fn.corner = function(o)
{
	function hex2(s) {
		var s = parseInt(s).toString(16);
		if ( s.length < 2 ) s = "0"+s;
		return s;
	}
	function gpc(node) {
		for ( ; node && node.nodeName.toLowerCase() != "html"; node = node.parentNode  ) {
			var v = $.css(node,"backgroundColor");
			if ( v.indexOf("rgb") >= 0 ) { 
				rgb = v.match(/\d+/g); 
				return "#"+ hex2(rgb[0]) + hex2(rgb[1]) + hex2(rgb[2]);
			}
			if ( v && v != "transparent" )
				return v;
		}
		return "#ffffff";
    };
	o = o || "";
	var width = parseInt((o.match(/(\d+)px/)||[])[1]) || 10;
	var fx = (o.match(/round|bevel|fold|notch/)||["round"])[0];
	var opts = {
		TL:		/top|tl/i.test(o), 		TR:		/top|tr/i.test(o),
		BL:		/bottom|bl/i.test(o),	BR:		/bottom|br/i.test(o)//,
	};
	if ( !opts.TL && !opts.TR && !opts.BL && !opts.BR )
		opts = { TL:1, TR:1, BL:1, BR:1 };
	var strip = document.createElement("div");
	strip.style.overflow = "hidden";
	strip.style.height = "1px";
	strip.style.backgroundColor = "transparent";
	strip.style.borderStyle = "solid";
	return this.each(function(){
		var pad = {
			T: parseInt($.css(this,"paddingTop"))||0,
			R: parseInt($.css(this,"paddingRight"))||0,
			B: parseInt($.css(this,"paddingBottom"))||0,
			L: parseInt($.css(this,"paddingLeft"))||0
		};
		strip.style.borderColor = gpc(this.parentNode);
		if ( opts.TL || opts.TR ) {
			strip.style.borderStyle = "none "+(opts.TR?"solid":"none")+" none "+(opts.TL?"solid":"none");
			var t=document.createElement("div");
			t.style.margin = "-"+pad.T+"px -"+pad.R+"px "+(pad.T-width)+"px -"+pad.L+"px";
			t.style.backgroundColor = "transparent";
			for ( var i=0; i < width; i++ ) {
				var w = fx=="round" ? Math.round(width*(1-Math.cos(Math.asin(i/width)))) : i+1;
				var e = strip.cloneNode(false);
				e.style.borderWidth = "0 "+(opts.TR?w:0)+"px 0 "+(opts.TL?w:0)+"px";
				t.insertBefore(e, t.firstChild);
			}
			this.insertBefore(t, this.firstChild);
		}
		if ( opts.BL || opts.BR ) {
			strip.style.borderStyle = "none "+(opts.BR?"solid":"none")+" none "+(opts.BL?"solid":"none");
			var b=document.createElement("div");
			b.style.margin = (pad.B-width)+"px -"+pad.R+"px -"+pad.B+"px -"+pad.L+"px";
			b.style.backgroundColor = "transparent";
			
		//	$(b).css({width: "100%",bottom: "0px",position: "absolute"});
			for ( var i=0; i < width; i++ ) {
				var w = fx=="round" ? Math.round(width*(1-Math.cos(Math.asin(i/width)))) : i+1;
				var e = strip.cloneNode(false);
				e.style.borderWidth = "0 "+(opts.BR?w:0)+"px 0 "+(opts.BL?w:0)+"px";
				b.appendChild(e);
			}
			this.appendChild(b);
		}
	});
};