// jquery-roundcorners-canvas
// www.meerbox.nl

(function($){

	var _corner = function(options) {

		// nothing to do, so return
		if (this.length==0) return this;

		// excanvas.js not loaded
		if ($.browser.msie && typeof G_vmlCanvasManager == 'undefined') return this;

		// get lowest number from array
		var asNum = function(a, b) { return a-b; };
		var getMin = function(a) {
			var b = a.concat();
			return b.sort(asNum)[0];
		};

		// get CSS value as integer
		var getCSSint = function(el, prop) {
			return parseInt($.css(el.jquery?el[0]:el,prop))||0;
		};

		// draw the round corner in Canvas object
		var drawRoundCornerCanvasShape = function(canvas,radius,r_type,bg_color,border_width,border_color) {

			// change rgba(1,2,3,0.9) to rgb(1,2,3)
			var reg = /^rgba\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/;
			var bits = reg.exec(bg_color);
			if (bits) {
				channels = new Array(parseInt(bits[1]),parseInt(bits[2]),parseInt(bits[3]));
				bg_color = 'rgb('+channels[0]+', '+channels[1]+', '+channels[2]+')';
			}

			var border_width = parseInt(border_width);

			var ctx = canvas.getContext('2d');

			if (radius == 1) {
				ctx.fillStyle = bg_color;
				ctx.fillRect(0,0,1,1);
				return;
			}

			if (r_type == 'tl') {
				var steps = new Array(0,0,radius,0,radius,0,0,radius,0,0);
			} else if (r_type == 'tr') {
				var steps = new Array(radius,0,radius,radius,radius,0,0,0,0,0);
			} else if (r_type == 'bl') {
				var steps = new Array(0,radius,radius,radius,0,radius,0,0,0,radius);
			} else if (r_type == 'br') {
				var steps = new Array(radius,radius,radius,0,radius,0,0,radius,radius,radius);
			}

			ctx.fillStyle = bg_color;
	    	ctx.beginPath();
	     	ctx.moveTo(steps[0],steps[1]);
	     	ctx.lineTo(steps[2], steps[3]);
	    	if(r_type == 'br') ctx.bezierCurveTo(steps[4], steps[5], radius, radius, steps[6], steps[7]);
	    	else ctx.bezierCurveTo(steps[4], steps[5], 0, 0, steps[6], steps[7]);
			ctx.lineTo(steps[8], steps[9]);
	        ctx.fill();

	        // draw border
	        if (border_width > 0 && border_width < radius) {

		        // offset caused by border
		        var offset = border_width/2;

		        if (r_type == 'tl') {
					var steps = new Array(radius-offset,offset,radius-offset,offset,offset,radius-offset);
					var curve_to = new Array(0,0);
				} else if (r_type == 'tr') {
					var steps = new Array(radius-offset,radius-offset,radius-offset,offset,offset,offset);
					var curve_to = new Array(0,0);
				} else if (r_type == 'bl') {
					var steps = new Array(radius-offset,radius-offset,offset,radius-offset,offset,offset,offset,radius-offset);
					var curve_to = new Array(0,0);
				} else if (r_type == 'br') {
					var steps = new Array(radius-offset,offset,radius-offset,offset,offset,radius-offset,radius-offset,radius-offset);
					var curve_to = new Array(radius, radius);
				}

		        ctx.strokeStyle = border_color;
		        ctx.lineWidth = border_width;
	    		ctx.beginPath();
	    		// go to corner to begin curve
	     		ctx.moveTo(steps[0], steps[1]);
	     		// curve from righttop to leftbottom (for the tl canvas)
	    		ctx.bezierCurveTo(steps[2], steps[3], curve_to[0], curve_to[1], steps[4], steps[5]);
				ctx.stroke();

		    }
		};

		var creatCanvas = function(p,radius) {
			var elm = document.createElement('canvas');
			elm.setAttribute("height", radius);
    		elm.setAttribute("width", radius);
			elm.style.display = "block";
			elm.style.position = "absolute";
			elm.className = "cornercanvas";
			elm = p.appendChild(elm);
			if (!elm.getContext && typeof G_vmlCanvasManager != 'undefined') {
				elm = G_vmlCanvasManager.initElement(elm);
			}
			return elm;
		};

		// interpret the (string) argument
   		var o = (options || "").toLowerCase();
   		var radius = parseInt((o.match(/(\d+)px/)||[])[1]) || null; // corner width
   		var bg_color = ((o.match(/(#[0-9a-f]+)/)||[])[1]);  // strip color
   		if (radius == null) { radius = "auto"; }

   		var edges = { T:0, B:1 };
    	var opts = {
        	tl:  /top|tl/.test(o),
        	tr:  /top|tr/.test(o),
        	bl:  /bottom|bl/.test(o),
        	br:  /bottom|br/.test(o)
    	};
    	if ( !opts.tl && !opts.tr && !opts.bl && !opts.br) {
        	opts = { tl:1, tr:1, bl:1, br:1 };
        }

		return this.each(function() {

			var elm = $(this);
			var hover = /hover/.test(o);

			if (hover) {

				options = options.replace(/hover/i, "");

				elm.hover(function(){
					$(this).addClass('jrcHover');
					$(this).corner(options);
				},function(){
					$(this).removeClass('jrcHover');
					$(this).corner(options);
				});

			}

	   		if ($.browser.msie) {

		   		// give element 'haslayout'
		   		elm.css('zoom','1');
		   		// give the child elements 'haslayout'
		   		elm.children().css('zoom','1');

		   		// msie6 rendering bugs :(
				if ($.browser.msie && typeof document.body.style.maxHeight == "undefined") {
					if (elm.css('height') == 'auto') elm.height(elm.height());
				 	if (elm.width()%2 != 0) { elm.width(elm.width()+1); }
				 	if (elm.height()%2 != 0) { elm.height(elm.height()+1); }
				 	if (elm.css('lineHeight') != 'normal' && elm.height() < elm.css('lineHeight')) {
					 	elm.css('lineHeight', elm.height());
					}
					if (elm.css('lineHeight') == 'normal') elm.css('lineHeight','1'); // dont ask
				}
		   	}

			var arr = new Array(elm.get(0).offsetHeight,elm.get(0).offsetWidth);
			if (elm.height() != 0) arr[arr.length] = elm.height();
			if (elm.width() != 0) arr[arr.length] = elm.width();
			var widthheight_smallest = getMin(arr);

			// the size of the corner is not defined...
			if (radius == "auto") {
				radius = widthheight_smallest/2;
				if (radius > 10) { radius = 10; }
			}

			// the size of the corner can't be to high
			if (radius > widthheight_smallest/2) {
				radius = (widthheight_smallest/2);
			}

			radius = Math.floor(radius);

			// some css thats required in order to position the canvas elements
			if (elm.css('position') == 'static') {
				elm.css('position','relative');
			// only needed for ie6 and (ie7 in Quirks mode) , CSS1Compat == Strict mode
			} else if (elm.css('position') == 'fixed' && $.browser.msie && !(document.compatMode == 'CSS1Compat' && typeof document.body.style.maxHeight != "undefined")) {
				elm.css('position','absolute');
			}
			elm.css('overflow','visible');

			// get border width
			var border_t = getCSSint(this, 'borderTopWidth');
			var border_r = getCSSint(this, 'borderRightWidth');
			var border_b = getCSSint(this, 'borderBottomWidth');
			var border_l = getCSSint(this, 'borderLeftWidth');

			// get the lowest borderwidth of the corners in use
			var bordersWidth = new Array();
			if (opts.tl || opts.tr) { bordersWidth.push(border_t); }
			if (opts.br || opts.tr) { bordersWidth.push(border_r); }
			if (opts.br || opts.bl) { bordersWidth.push(border_b); }
			if (opts.bl || opts.tl) { bordersWidth.push(border_l); }

			var borderswidth_smallest = getMin(bordersWidth);

			// creat the canvas elements and position them
			var p_top = 0-border_t;
			var p_right = 0-border_r;
			var p_bottom = 0-border_b;
			var p_left = 0-border_l;

			// remove old stuff
			elm.children("canvas.cornercanvas").remove();

			if (opts.tl) { var tl = $(creatCanvas(this,radius)).css({left:p_left,top:p_top}).get(0); }
			if (opts.tr) { var tr = $(creatCanvas(this,radius)).css({right:p_right,top:p_top}).get(0); }
			if (opts.bl) { var bl = $(creatCanvas(this,radius)).css({left:p_left,bottom:p_bottom}).get(0); }
			if (opts.br) { var br = $(creatCanvas(this,radius)).css({right:p_right,bottom:p_bottom}).get(0); }

			// get the background color of parent element
			if (bg_color == undefined) {
				var current_p = elm.parent();
				var bg = current_p.css('background-color');
				while((bg == "transparent" || bg == "rgba(0, 0, 0, 0)") && (typeof current_p == 'object') && !current_p.is("html")) {
					bg = current_p.css('background-color');
					current_p = current_p.parent();
				}

			} else {
				bg = bg_color;
			}

			if (bg == "transparent" || bg == "rgba(0, 0, 0, 0)") { bg = "#ffffff"; }

			if (opts.tl) { drawRoundCornerCanvasShape(tl,radius,'tl',bg,borderswidth_smallest,elm.css('borderTopColor')); }
			if (opts.tr) { drawRoundCornerCanvasShape(tr,radius,'tr',bg,borderswidth_smallest,elm.css('borderTopColor')); }
			if (opts.bl) { drawRoundCornerCanvasShape(bl,radius,'bl',bg,borderswidth_smallest,elm.css('borderBottomColor')); }
			if (opts.br) { drawRoundCornerCanvasShape(br,radius,'br',bg,borderswidth_smallest,elm.css('borderBottomColor')); }

			elm.addClass('roundCornersParent');

   		});
	};

	$.fn.corner = _corner;

})(jQuery);

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/* ######### ebenen mit ecken definieren ########### */
$(function() {
			$("#mainblockgrau").corner("15px");
			$("#mainblockblau").corner("15px");
			$("#was_bedeuten_die_icons").corner("15px");
			$("#mainblockgreen").corner("15px");
			$(".saved_box").corner("15px");
			$(".blau_dreierbox").corner("15px");
			$(".gruen_dreierbox").corner("15px");
			$(".gelb_dreierbox").corner("15px");
			$(".blauschmal").corner("15px");
			$(".blauschmal2").corner("15px");
			$(".gruenschmal").corner("15px");
			$(".navbox").corner("8px");
//			$("#calendar_top_bubbles").corner("8px");
            $("#zweireiterblauoben").corner("top 15px");
            $("#zweireiterbraunoben").corner("top 15px");
            $("#zweireiterdunkelbraunoben").corner("top 15px");
            $("#zweireitergruenoben").corner("top 15px");
            $("#mainblockgruenoben").corner("top 15px");
			$("#mainblockblauoben").corner("top 15px");
			$("#mainblockgrauoben").corner("top 15px");
			$("#mainblockgelboben").corner("top 15px");
			$("#mainblockunten").corner("bottom 15px");


$('#slideshow').before('<ul id="nav">').cycle({
fx: 'turnDown',
speed: 'fast',
timeout: 0,
pager: '#nav',
pagerAnchorBuilder: function(idx, slide){
return '<li><a href="#"><img src="' + slide.src + '" width="50" height="50" /></a></li>';
}
});



});