;(function ($) {
	var ie6 = $.browser.msie && parseInt($.browser.version) === 6 && typeof window['XMLHttpRequest'] !== 'object',
		ie7 = $.browser.msie && parseInt($.browser.version) === 7,
		ieQuirks = null,
		w = [];
	$.modal = function (data, options) {
		return $.modal.impl.init(data, options);
	};
	$.modal.close = function () {
		$.modal.impl.close();
	};
	$.modal.focus = function (pos) {
		$.modal.impl.focus(pos);
	};
	$.modal.setContainerDimensions = function () {
		$.modal.impl.setContainerDimensions();
	};
	$.modal.setPosition = function () {
		$.modal.impl.setPosition();
	};
	$.modal.update = function (height, width) {
		$.modal.impl.update(height, width);
	};
	$.fn.modal = function (options) {
		return $.modal.impl.init(this, options);
	};
	$.modal.defaults = {
		appendTo: 'body',
		focus: true,
		opacity: 50,
		overlayId: 'simplemodal-overlay',
		overlayCss: {},
		containerId: 'simplemodal-container',
		containerCss: {},
		dataId: 'simplemodal-data',
		dataCss: {},
		minHeight: null,
		minWidth: null,
		maxHeight: null,
		maxWidth: null,
		autoResize: false,
		autoPosition: true,
		zIndex: 1000,
		close: true,
		closeHTML: '<a class="modalCloseImg" title="Close"></a>',
		closeClass: 'simplemodal-close',
		escClose: true,
		overlayClose: false,
		position: null,
		persist: false,
		modal: true,
		onOpen: null,
		onShow: null,
		onClose: null
	};
	$.modal.impl = {
		d: {},
		init: function (data, options) {
			var s = this;
			if (s.d.data) {
				return false;
			}
			ieQuirks = $.browser.msie && !$.boxModel;
			s.o = $.extend({}, $.modal.defaults, options);
			s.zIndex = s.o.zIndex;
			s.occb = false;
			if (typeof data === 'object') {
				data = data instanceof jQuery ? data : $(data);
				s.d.placeholder = false;
				if (data.parent().parent().size() > 0) {
					data.before($('<span></span>')
						.attr('id', 'simplemodal-placeholder')
						.css({display: 'none'}));

					s.d.placeholder = true;
					s.display = data.css('display');
					if (!s.o.persist) {
						s.d.orig = data.clone(true);
					}
				}
			}
			else if (typeof data === 'string' || typeof data === 'number') {
				data = $('<div></div>').html(data);
			}
			else {
				alert('SimpleModal Error: Unsupported data type: ' + typeof data);
				return s;
			}
			s.create(data);
			data = null;
			s.open();
			if ($.isFunction(s.o.onShow)) {
				s.o.onShow.apply(s, [s.d]);
			}
			return s;
		},
		create: function (data) {
			var s = this;
			w = s.getDimensions();
			if (s.o.modal && ie6) {
				s.d.iframe = $('<iframe src="javascript:false;"></iframe>')
					.css($.extend(s.o.iframeCss, {
						display: 'none',
						opacity: 0,
						position: 'fixed',
						height: w[0],
						width: w[1],
						zIndex: s.o.zIndex,
						top: 0,
						left: 0
					}))
					.appendTo(s.o.appendTo);
			}
			s.d.overlay = $('<div></div>')
				.attr('id', s.o.overlayId)
				.addClass('simplemodal-overlay')
				.css($.extend(s.o.overlayCss, {
					display: 'none',
					opacity: s.o.opacity / 100,
					height: s.o.modal ? w[0] : 0,
					width: s.o.modal ? w[1] : 0,
					position: 'fixed',
					left: 0,
					top: 0,
					zIndex: s.o.zIndex + 1
				}))
				.appendTo(s.o.appendTo);
			s.d.container = $('<div></div>')
				.attr('id', s.o.containerId)
				.addClass('simplemodal-container')
				.css($.extend(s.o.containerCss, {
					display: 'none',
					position: 'fixed',
					zIndex: s.o.zIndex + 2
				}))
				.append(s.o.close && s.o.closeHTML
					? $(s.o.closeHTML).addClass(s.o.closeClass)
					: '')
				.appendTo(s.o.appendTo);

			s.d.wrap = $('<div></div>')
				.attr('tabIndex', -1)
				.addClass('simplemodal-wrap')
				.css({height: '100%', outline: 0, width: '100%'})
				.appendTo(s.d.container);
			s.d.data = data
				.attr('id', data.attr('id') || s.o.dataId)
				.addClass('simplemodal-data')
				.css($.extend(s.o.dataCss, {
						display: 'none'
				}))
				.appendTo('body');
			data = null;

			s.setContainerDimensions();
			s.d.data.appendTo(s.d.wrap);
			if (ie6 ) {
				s.fixIE();
			}
		},
		bindEvents: function () {
			var s = this;
		$('.' + s.o.closeClass).bind('click.simplemodal', function (e) {
				e.preventDefault();
				s.close();
			});
			if (s.o.modal && s.o.close && s.o.overlayClose) {
				s.d.overlay.bind('click.simplemodal', function (e) {
					e.preventDefault();
					s.close();
				});
			}
			$(document).bind('keydown.simplemodal', function (e) {
				if (s.o.modal && e.keyCode === 9) { // TAB
					s.watchTab(e);
				}
				else if ((s.o.close && s.o.escClose) && e.keyCode === 27) { // ESC
					e.preventDefault();
					s.close();
				}
			});
			$(window).bind('resize.simplemodal', function () {
				w = s.getDimensions();
				s.o.autoResize ? s.setContainerDimensions() : s.o.autoPosition && s.setPosition();

				if (ie6 ) {
					s.fixIE();
				}
				else if (s.o.modal) {
					s.d.iframe && s.d.iframe.css({height: w[0], width: w[1]});
					s.d.overlay.css({height: w[0], width: w[1]});
				}
			});
		},
		unbindEvents: function () {
			$('.' + this.o.closeClass).unbind('click.simplemodal');
			$(document).unbind('keydown.simplemodal');
			$(window).unbind('resize.simplemodal');
			this.d.overlay.unbind('click.simplemodal');
		},
		fixIE: function () {
			var s = this, p = s.o.position;

			// simulate fixed position - adapted from BlockUI
			$.each([s.d.iframe || null, !s.o.modal ? null : s.d.overlay, s.d.container], function (i, el) {
				if (el) {
					var bch = 'document.body.clientHeight', bcw = 'document.body.clientWidth',
						bsh = 'document.body.scrollHeight', bsl = 'document.body.scrollLeft',
						bst = 'document.body.scrollTop', bsw = 'document.body.scrollWidth',
						ch = 'document.documentElement.clientHeight', cw = 'document.documentElement.clientWidth',
						sl = 'document.documentElement.scrollLeft', st = 'document.documentElement.scrollTop',
						s = el[0].style;

					s.position = 'absolute';
					if (i < 2) {
						s.removeExpression('height');
						s.removeExpression('width');
						s.setExpression('height','' + bsh + ' > ' + bch + ' ? ' + bsh + ' : ' + bch + ' + "px"');
						s.setExpression('width','' + bsw + ' > ' + bcw + ' ? ' + bsw + ' : ' + bcw + ' + "px"');
					}
					else {
						var te, le;
						if (p && p.constructor === Array) {
							var top = p[0]
								? typeof p[0] === 'number' ? p[0].toString() : p[0].replace(/px/, '')
								: el.css('top').replace(/px/, '');
							te = top.indexOf('%') === -1
								? top + ' + (t = ' + st + ' ? ' + st + ' : ' + bst + ') + "px"'
								: parseInt(top.replace(/%/, '')) + ' * ((' + ch + ' || ' + bch + ') / 100) + (t = ' + st + ' ? ' + st + ' : ' + bst + ') + "px"';

							if (p[1]) {
								var left = typeof p[1] === 'number' ? p[1].toString() : p[1].replace(/px/, '');
								le = left.indexOf('%') === -1
									? left + ' + (t = ' + sl + ' ? ' + sl + ' : ' + bsl + ') + "px"'
									: parseInt(left.replace(/%/, '')) + ' * ((' + cw + ' || ' + bcw + ') / 100) + (t = ' + sl + ' ? ' + sl + ' : ' + bsl + ') + "px"';
							}
						}
						else {
							te = '(' + ch + ' || ' + bch + ') / 2 - (this.offsetHeight / 2) + (t = ' + st + ' ? ' + st + ' : ' + bst + ') + "px"';
							le = '(' + cw + ' || ' + bcw + ') / 2 - (this.offsetWidth / 2) + (t = ' + sl + ' ? ' + sl + ' : ' + bsl + ') + "px"';
						}
						s.removeExpression('top');
						s.removeExpression('left');
						s.setExpression('top', te);
						s.setExpression('left', le);
					}
				}
			});
		},
		focus: function (pos) {
			var s = this, p = pos && $.inArray(pos, ['first', 'last']) !== -1 ? pos : 'first';
			var input = $(':input:enabled:visible:' + p, s.d.wrap);
			setTimeout(function () {
				input.length > 0 ? input.focus() : s.d.wrap.focus();
			}, 10);
		},
		getDimensions: function () {
			var el = $(window);
			var h = $.browser.opera && $.browser.version > '9.5' && $.fn.jquery < '1.3'
						|| $.browser.opera && $.browser.version < '9.5' && $.fn.jquery > '1.2.6'
				? el[0].innerHeight : el.height();

			return [h, el.width()];
		},
		getVal: function (v, d) {
			return v ? (typeof v === 'number' ? v
					: v === 'auto' ? 0
					: v.indexOf('%') > 0 ? ((parseInt(v.replace(/%/, '')) / 100) * (d === 'h' ? w[0] : w[1]))
					: parseInt(v.replace(/px/, '')))
				: null;
		},
		update: function (height, width) {
			var s = this;
			if (!s.d.data) {
				return false;
			}
			s.d.origHeight = s.getVal(height, 'h');
			s.d.origWidth = s.getVal(width, 'w');
			s.d.data.hide();
			height && s.d.container.css('height', height);
			width && s.d.container.css('width', width);
			s.setContainerDimensions();
			s.d.data.show();
			s.o.focus && s.focus();
			s.unbindEvents();
			s.bindEvents();
		},
		setContainerDimensions: function () {
			var s = this,
				badIE = ie6 || ie7;
			var ch = s.d.origHeight ? s.d.origHeight : $.browser.opera ? s.d.container.height() : s.getVal(badIE ? s.d.container[0].currentStyle['height'] : s.d.container.css('height'), 'h'),
				cw = s.d.origWidth ? s.d.origWidth : $.browser.opera ? s.d.container.width() : s.getVal(badIE ? s.d.container[0].currentStyle['width'] : s.d.container.css('width'), 'w'),
				dh = s.d.data.outerHeight(true), dw = s.d.data.outerWidth(true);

			s.d.origHeight = s.d.origHeight || ch;
			s.d.origWidth = s.d.origWidth || cw;
			var mxoh = s.o.maxHeight ? s.getVal(s.o.maxHeight, 'h') : null,
				mxow = s.o.maxWidth ? s.getVal(s.o.maxWidth, 'w') : null,
				mh = mxoh && mxoh < w[0] ? mxoh : w[0],
				mw = mxow && mxow < w[1] ? mxow : w[1];
			var moh = s.o.minHeight ? s.getVal(s.o.minHeight, 'h') : 'auto';
			if (!ch) {
				if (!dh) {ch = moh;}
				else {
					if (dh > mh) {ch = mh;}
					else if (s.o.minHeight && moh !== 'auto' && dh < moh) {ch = moh;}
					else {ch = dh;}
				}
			}
			else {
				ch = s.o.autoResize && ch > mh ? mh : ch < moh ? moh : ch;
			}
			var mow = s.o.minWidth ? s.getVal(s.o.minWidth, 'w') : 'auto';
			if (!cw) {
				if (!dw) {cw = mow;}
				else {
					if (dw > mw) {cw = mw;}
					else if (s.o.minWidth && mow !== 'auto' && dw < mow) {cw = mow;}
					else {cw = dw;}
				}
			}
			else {
				cw = s.o.autoResize && cw > mw ? mw : cw < mow ? mow : cw;
			}

			s.d.container.css({height: ch, width: cw});
			s.d.wrap.css({overflow: (dh > ch || dw > cw) ? 'auto' : 'visible'});
			s.o.autoPosition && s.setPosition();
		},
		setPosition: function () {
			var s = this, top, left,
				hc = (w[0]/2) - (s.d.container.outerHeight(true)/2),
				vc = (w[1]/2) - (s.d.container.outerWidth(true)/2);

			if (s.o.position && Object.prototype.toString.call(s.o.position) === '[object Array]') {
				top = s.o.position[0] || hc;
				left = s.o.position[1] || vc;
			} else {
				top = hc;
				left = vc;
			}
			s.d.container.css({left: left, top: top});
		},
		watchTab: function (e) {
			var s = this;

			if ($(e.target).parents('.simplemodal-container').length > 0) {
				// save the list of inputs
				s.inputs = $(':input:enabled:visible:first, :input:enabled:visible:last', s.d.data[0]);
			if ((!e.shiftKey && e.target === s.inputs[s.inputs.length -1]) ||
						(e.shiftKey && e.target === s.inputs[0]) ||
						s.inputs.length === 0) {
					e.preventDefault();
					var pos = e.shiftKey ? 'last' : 'first';
					s.focus(pos);
				}
			}
			else {
				e.preventDefault();
				s.focus();
			}
		},
		open: function () {
			var s = this;
			// display the iframe
			s.d.iframe && s.d.iframe.show();

			if ($.isFunction(s.o.onOpen)) {
				// execute the onOpen callback
				s.o.onOpen.apply(s, [s.d]);
			}
			else {
				// display the remaining elements
				s.d.overlay.show();
				s.d.container.show();
				s.d.data.show();
			}

			s.o.focus && s.focus();

			// bind default events
			s.bindEvents();
		},
		close: function () {
			var s = this;
			if (!s.d.data) {
				return false;
			}
			s.unbindEvents();

			if ($.isFunction(s.o.onClose) && !s.occb) {
				s.occb = true;
				s.o.onClose.apply(s, [s.d]);
			}
			else {
				// if the data came from the DOM, put it back
				if (s.d.placeholder) {
					var ph = $('#simplemodal-placeholder');
					// save changes to the data?
					if (s.o.persist) {
						// insert the (possibly) modified data back into the DOM
						ph.replaceWith(s.d.data.removeClass('simplemodal-data').css('display', s.display));
					}
					else {
						s.d.data.hide().remove();
						ph.replaceWith(s.d.orig);
					}
				}
				else {
					// otherwise, remove it
					s.d.data.hide().remove();
				}

				// remove the remaining elements
				s.d.container.hide().remove();
				s.d.overlay.hide();
				s.d.iframe && s.d.iframe.hide().remove();
				setTimeout(function(){
					// opera work-around
					s.d.overlay.remove();

					// reset the dialog object
					s.d = {};
				}, 10);
			}
		}
	};
})(jQuery);