Open a Form(popup) in Asp.net

Try this...




rel="stylesheet" type="text/css" />

$("[id*=btnModalPopup]").live("click", function () {
$("#modal_dialog").dialog({
title: "jQuery Modal Dialog Popup",
buttons: {
Close: function () {
$(this).dialog('close');
}
},
modal: true
});
return false;
});


<asp:button id="btnModalPopup" runat="server" text="Show Modal Popup" xmlns:asp="#unknown">

modalpopup extender:

ModalPopup Demonstration

how to use modalpopup extender

hey if you want to great popup for playing video,audio,open page,open image anything just use this code in your applicastion....

$(document).ready(function() {
    //Examples of how to assign the Colorbox event to elements
    $(".group1").colorbox({ rel: 'group1' });
    $(".group2").colorbox({ rel: 'group2', transition: "fade" });
    $(".group3").colorbox({  rel: 'group3',transition: "none", width: "75%", height: "75%" });
    $(".group4").colorbox({ rel: 'group4', slideshow: false });
    $(".ajax").colorbox();
    $(".image").colorbox({ rel: 'group3', transition: "none", width: "75%", height: "75%" });
    $(".youtube").colorbox({ iframe: true });
    //$(".video").colorbox({ iframe: true });
    $(".video").colorbox({ iframe: true, width: "80%", height: "80%" });
    $(".audio").colorbox({ iframe: true, innerWidth: 500, innerHeight: 409 });
    $(".image").colorbox({  transition: "none", width: "75%", height: "75%" });
    
    $(".vimeo").colorbox({ iframe: true, innerWidth: 500, innerHeight: 409 });
    $(".iframe").colorbox({ iframe: true, width: "80%", height: "80%" });
    $(".inline").colorbox({ inline: true, width: "50%" });
    $(".callbacks").colorbox({
        onOpen: function() { alert('onOpen: colorbox is about to open'); },
        onLoad: function() { alert('onLoad: colorbox has started to load the targeted content'); },
        onComplete: function() { alert('onComplete: colorbox has displayed the loaded content'); },
        onCleanup: function() { alert('onCleanup: colorbox has begun the close process'); },
        onClosed: function() { alert('onClosed: colorbox has completely closed'); }
    });

    $('.non-retina').colorbox({ rel: 'group5', transition: 'none' })
    $('.retina').colorbox({ rel: 'group5', transition: 'none', retinaImage: true, retinaUrl: true });

    //Example of preserving a JavaScript event for inline calls.
    $("#click").click(function() {
        $('#click').css({ "background-color": "#f00", "color": "#fff", "cursor": "inherit" }).text("Open this window again and this message will still be here.");
        return false;
    });
});

And secong JS(name should be jquery.colorbox) is..

(function ($, document, window) {
	var
	
	defaults = {
		// data sources
		html: false,
		photo: false,
		iframe: false,
		inline: false,

		// behavior and appearance
		transition: "elastic",
		speed: 300,
		fadeOut: 300,
		width: false,
		initialWidth: "600",
		innerWidth: false,
		maxWidth: false,
		height: false,
		initialHeight: "450",
		innerHeight: false,
		maxHeight: false,
		scalePhotos: true,
		scrolling: true,
		href: false,
		title: false,
		rel: false,
		opacity: 0.9,
		preloading: true,
		className: false,
		overlayClose: true,
		escKey: true,
		arrowKey: true,
		top: false,
		bottom: false,
		left: false,
		right: false,
		fixed: false,
		data: undefined,
		closeButton: true,
		fastIframe: true,
		open: false,
		reposition: true,
		loop: true,
		slideshow: false,
		slideshowAuto: true,
		slideshowSpeed: 2500,
		slideshowStart: "start slideshow",
		slideshowStop: "stop slideshow",
		photoRegex: /\.(gif|png|jp(e|g|eg)|bmp|ico|webp)((#|\?).*)?$/i,

		// alternate image paths for high-res displays
		retinaImage: false,
		retinaUrl: false,
		retinaSuffix: '@2x.$1',

		// internationalization
		current: "image {current} of {total}",
		previous: "previous",
		next: "next",
		close: "close",
		xhrError: "This content failed to load.",
		imgError: "This image failed to load.",

		// accessbility
		returnFocus: true,
		trapFocus: true,

		// callbacks
		onOpen: false,
		onLoad: false,
		onComplete: false,
		onCleanup: false,
		onClosed: false
	},
	
	// Abstracting the HTML and event identifiers for easy rebranding
	colorbox = 'colorbox',
	prefix = 'cbox',
	boxElement = prefix + 'Element',
	
	// Events
	event_open = prefix + '_open',
	event_load = prefix + '_load',
	event_complete = prefix + '_complete',
	event_cleanup = prefix + '_cleanup',
	event_closed = prefix + '_closed',
	event_purge = prefix + '_purge',

	// Cached jQuery Object Variables
	$overlay,
	$box,
	$wrap,
	$content,
	$topBorder,
	$leftBorder,
	$rightBorder,
	$bottomBorder,
	$related,
	$window,
	$loaded,
	$loadingBay,
	$loadingOverlay,
	$title,
	$current,
	$slideshow,
	$next,
	$prev,
	$close,
	$groupControls,
	$events = $('<a />'), // $([]) would be prefered, but there is an issue with jQuery 1.4.2
	
	// Variables for cached values or use across multiple functions
	settings,
	interfaceHeight,
	interfaceWidth,
	loadedHeight,
	loadedWidth,
	element,
	index,
	photo,
	open,
	active,
	closing,
	loadingTimer,
	publicMethod,
	div = "div",
	className,
	requests = 0,
	previousCSS = {},
	init;

	// ****************
	// HELPER FUNCTIONS
	// ****************
	
	// Convenience function for creating new jQuery objects
	function $tag(tag, id, css) {
		var element = document.createElement(tag);

		if (id) {
			element.id = prefix + id;
		}

		if (css) {
			element.style.cssText = css;
		}

		return $(element);
	}
	
	// Get the window height using innerHeight when available to avoid an issue with iOS
	// http://bugs.jquery.com/ticket/6724
	function winheight() {
		return window.innerHeight ? window.innerHeight : $(window).height();
	}

	// Determine the next and previous members in a group.
	function getIndex(increment) {
		var
		max = $related.length,
		newIndex = (index + increment) % max;
		
		return (newIndex < 0) ? max + newIndex : newIndex;
	}

	// Convert '%' and 'px' values to integers
	function setSize(size, dimension) {
		return Math.round((/%/.test(size) ? ((dimension === 'x' ? $window.width() : winheight()) / 100) : 1) * parseInt(size, 10));
	}
	
	// Checks an href to see if it is a photo.
	// There is a force photo option (photo: true) for hrefs that cannot be matched by the regex.
	function isImage(settings, url) {
		return settings.photo || settings.photoRegex.test(url);
	}

	function retinaUrl(settings, url) {
		return settings.retinaUrl && window.devicePixelRatio > 1 ? url.replace(settings.photoRegex, settings.retinaSuffix) : url;
	}

	function trapFocus(e) {
		if ('contains' in $box[0] && !$box[0].contains(e.target)) {
			e.stopPropagation();
			$box.focus();
		}
	}

	// Assigns function results to their respective properties
	function makeSettings() {
		var i,
			data = $.data(element, colorbox);
		
		if (data == null) {
			settings = $.extend({}, defaults);
			if (console && console.log) {
				console.log('Error: cboxElement missing settings object');
			}
		} else {
			settings = $.extend({}, data);
		}
		
		for (i in settings) {
			if ($.isFunction(settings[i]) && i.slice(0, 2) !== 'on') { // checks to make sure the function isn't one of the callbacks, they will be handled at the appropriate time.
				settings[i] = settings[i].call(element);
			}
		}
		
		settings.rel = settings.rel || element.rel || $(element).data('rel') || 'nofollow';
		settings.href = settings.href || $(element).attr('href');
		settings.title = settings.title || element.title;
		
		if (typeof settings.href === "string") {
			settings.href = $.trim(settings.href);
		}
	}

	function trigger(event, callback) {
		// for external use
		$(document).trigger(event);

		// for internal use
		$events.triggerHandler(event);

		if ($.isFunction(callback)) {
			callback.call(element);
		}
	}


	var slideshow = (function(){
		var active,
			className = prefix + "Slideshow_",
			click = "click." + prefix,
			timeOut;

		function clear () {
			clearTimeout(timeOut);
		}

		function set() {
			if (settings.loop || $related[index + 1]) {
				clear();
				timeOut = setTimeout(publicMethod.next, settings.slideshowSpeed);
			}
		}

		function start() {
			$slideshow
				.html(settings.slideshowStop)
				.unbind(click)
				.one(click, stop);

			$events
				.bind(event_complete, set)
				.bind(event_load, clear);

			$box.removeClass(className + "off").addClass(className + "on");
		}

		function stop() {
			clear();
			
			$events
				.unbind(event_complete, set)
				.unbind(event_load, clear);

			$slideshow
				.html(settings.slideshowStart)
				.unbind(click)
				.one(click, function () {
					publicMethod.next();
					start();
				});

			$box.removeClass(className + "on").addClass(className + "off");
		}

		function reset() {
			active = false;
			$slideshow.hide();
			clear();
			$events
				.unbind(event_complete, set)
				.unbind(event_load, clear);
			$box.removeClass(className + "off " + className + "on");
		}

		return function(){
			if (active) {
				if (!settings.slideshow) {
					$events.unbind(event_cleanup, reset);
					reset();
				}
			} else {
				if (settings.slideshow && $related[1]) {
					active = true;
					$events.one(event_cleanup, reset);
					if (settings.slideshowAuto) {
						start();
					} else {
						stop();
					}
					$slideshow.show();
				}
			}
		};

	}());


	function launch(target) {
		if (!closing) {
			
			element = target;
			
			makeSettings();
			
			$related = $(element);
			
			index = 0;
			
			if (settings.rel !== 'nofollow') {
				$related = $('.' + boxElement).filter(function () {
					var data = $.data(this, colorbox),
						relRelated;

					if (data) {
						relRelated =  $(this).data('rel') || data.rel || this.rel;
					}
					
					return (relRelated === settings.rel);
				});
				index = $related.index(element);
				
				// Check direct calls to Colorbox.
				if (index === -1) {
					$related = $related.add(element);
					index = $related.length - 1;
				}
			}
			
			$overlay.css({
				opacity: parseFloat(settings.opacity),
				cursor: settings.overlayClose ? "pointer" : "auto",
				visibility: 'visible'
			}).show();
			

			if (className) {
				$box.add($overlay).removeClass(className);
			}
			if (settings.className) {
				$box.add($overlay).addClass(settings.className);
			}
			className = settings.className;

			if (settings.closeButton) {
				$close.html(settings.close).appendTo($content);
			} else {
				$close.appendTo('<div />');
			}

			if (!open) {
				open = active = true; // Prevents the page-change action from queuing up if the visitor holds down the left or right keys.
				
				// Show colorbox so the sizes can be calculated in older versions of jQuery
				$box.css({visibility:'hidden', display:'block'});
				
				$loaded = $tag(div, 'LoadedContent', 'width:0; height:0; overflow:hidden');
				$content.css({width:'', height:''}).append($loaded);

				// Cache values needed for size calculations
				interfaceHeight = $topBorder.height() + $bottomBorder.height() + $content.outerHeight(true) - $content.height();
				interfaceWidth = $leftBorder.width() + $rightBorder.width() + $content.outerWidth(true) - $content.width();
				loadedHeight = $loaded.outerHeight(true);
				loadedWidth = $loaded.outerWidth(true);

				// Opens inital empty Colorbox prior to content being loaded.
				settings.w = setSize(settings.initialWidth, 'x');
				settings.h = setSize(settings.initialHeight, 'y');
				$loaded.css({width:'', height:settings.h});
				publicMethod.position();

				trigger(event_open, settings.onOpen);
				
				$groupControls.add($title).hide();

				$box.focus();
				
				if (settings.trapFocus) {
					// Confine focus to the modal
					// Uses event capturing that is not supported in IE8-
					if (document.addEventListener) {

						document.addEventListener('focus', trapFocus, true);
						
						$events.one(event_closed, function () {
							document.removeEventListener('focus', trapFocus, true);
						});
					}
				}

				// Return focus on closing
				if (settings.returnFocus) {
					$events.one(event_closed, function () {
						$(element).focus();
					});
				}
			}
			load();
		}
	}

	// Colorbox's markup needs to be added to the DOM prior to being called
	// so that the browser will go ahead and load the CSS background images.
	function appendHTML() {
		if (!$box && document.body) {
			init = false;
			$window = $(window);
			$box = $tag(div).attr({
				id: colorbox,
				'class': $.support.opacity === false ? prefix + 'IE' : '', // class for optional IE8 & lower targeted CSS.
				role: 'dialog',
				tabindex: '-1'
			}).hide();
			$overlay = $tag(div, "Overlay").hide();
			$loadingOverlay = $([$tag(div, "LoadingOverlay")[0],$tag(div, "LoadingGraphic")[0]]);
			$wrap = $tag(div, "Wrapper");
			$content = $tag(div, "Content").append(
				$title = $tag(div, "Title"),
				$current = $tag(div, "Current"),
				$prev = $('<button type="button"/>').attr({id:prefix+'Previous'}),
				$next = $('<button type="button"/>').attr({id:prefix+'Next'}),
				$slideshow = $tag('button', "Slideshow"),
				$loadingOverlay
			);

			$close = $('<button type="button"/>').attr({id:prefix+'Close'});
			
			$wrap.append( // The 3x3 Grid that makes up Colorbox
				$tag(div).append(
					$tag(div, "TopLeft"),
					$topBorder = $tag(div, "TopCenter"),
					$tag(div, "TopRight")
				),
				$tag(div, false, 'clear:left').append(
					$leftBorder = $tag(div, "MiddleLeft"),
					$content,
					$rightBorder = $tag(div, "MiddleRight")
				),
				$tag(div, false, 'clear:left').append(
					$tag(div, "BottomLeft"),
					$bottomBorder = $tag(div, "BottomCenter"),
					$tag(div, "BottomRight")
				)
			).find('div div').css({'float': 'left'});
			
			$loadingBay = $tag(div, false, 'position:absolute; width:9999px; visibility:hidden; display:none; max-width:none;');
			
			$groupControls = $next.add($prev).add($current).add($slideshow);

			$(document.body).append($overlay, $box.append($wrap, $loadingBay));
		}
	}

	// Add Colorbox's event bindings
	function addBindings() {
		function clickHandler(e) {
			// ignore non-left-mouse-clicks and clicks modified with ctrl / command, shift, or alt.
			// See: http://jacklmoore.com/notes/click-events/
			if (!(e.which > 1 || e.shiftKey || e.altKey || e.metaKey || e.ctrlKey)) {
				e.preventDefault();
				launch(this);
			}
		}

		if ($box) {
			if (!init) {
				init = true;

				// Anonymous functions here keep the public method from being cached, thereby allowing them to be redefined on the fly.
				$next.click(function () {
					publicMethod.next();
				});
				$prev.click(function () {
					publicMethod.prev();
				});
				$close.click(function () {
					publicMethod.close();
				});
				$overlay.click(function () {
					if (settings.overlayClose) {
						publicMethod.close();
					}
				});
				
				// Key Bindings
				$(document).bind('keydown.' + prefix, function (e) {
					var key = e.keyCode;
					if (open && settings.escKey && key === 27) {
						e.preventDefault();
						publicMethod.close();
					}
					if (open && settings.arrowKey && $related[1] && !e.altKey) {
						if (key === 37) {
							e.preventDefault();
							$prev.click();
						} else if (key === 39) {
							e.preventDefault();
							$next.click();
						}
					}
				});

				if ($.isFunction($.fn.on)) {
					// For jQuery 1.7+
					$(document).on('click.'+prefix, '.'+boxElement, clickHandler);
				} else {
					// For jQuery 1.3.x -> 1.6.x
					// This code is never reached in jQuery 1.9, so do not contact me about 'live' being removed.
					// This is not here for jQuery 1.9, it's here for legacy users.
					$('.'+boxElement).live('click.'+prefix, clickHandler);
				}
			}
			return true;
		}
		return false;
	}

	// Don't do anything if Colorbox already exists.
	if ($.colorbox) {
		return;
	}

	// Append the HTML when the DOM loads
	$(appendHTML);


	// ****************
	// PUBLIC FUNCTIONS
	// Usage format: $.colorbox.close();
	// Usage from within an iframe: parent.jQuery.colorbox.close();
	// ****************
	
	publicMethod = $.fn[colorbox] = $[colorbox] = function (options, callback) {
		var $this = this;
		
		options = options || {};
		
		appendHTML();

		if (addBindings()) {
			if ($.isFunction($this)) { // assume a call to $.colorbox
				$this = $('<a />');
				options.open = true;
			} else if (!$this[0]) { // colorbox being applied to empty collection
				return $this;
			}
			
			if (callback) {
				options.onComplete = callback;
			}
			
			$this.each(function () {
				$.data(this, colorbox, $.extend({}, $.data(this, colorbox) || defaults, options));
			}).addClass(boxElement);
			
			if (($.isFunction(options.open) && options.open.call($this)) || options.open) {
				launch($this[0]);
			}
		}
		
		return $this;
	};

	publicMethod.position = function (speed, loadedCallback) {
		var
		css,
		top = 0,
		left = 0,
		offset = $box.offset(),
		scrollTop,
		scrollLeft;
		
		$window.unbind('resize.' + prefix);

		// remove the modal so that it doesn't influence the document width/height
		$box.css({top: -9e4, left: -9e4});

		scrollTop = $window.scrollTop();
		scrollLeft = $window.scrollLeft();

		if (settings.fixed) {
			offset.top -= scrollTop;
			offset.left -= scrollLeft;
			$box.css({position: 'fixed'});
		} else {
			top = scrollTop;
			left = scrollLeft;
			$box.css({position: 'absolute'});
		}

		// keeps the top and left positions within the browser's viewport.
		if (settings.right !== false) {
			left += Math.max($window.width() - settings.w - loadedWidth - interfaceWidth - setSize(settings.right, 'x'), 0);
		} else if (settings.left !== false) {
			left += setSize(settings.left, 'x');
		} else {
			left += Math.round(Math.max($window.width() - settings.w - loadedWidth - interfaceWidth, 0) / 2);
		}
		
		if (settings.bottom !== false) {
			top += Math.max(winheight() - settings.h - loadedHeight - interfaceHeight - setSize(settings.bottom, 'y'), 0);
		} else if (settings.top !== false) {
			top += setSize(settings.top, 'y');
		} else {
			top += Math.round(Math.max(winheight() - settings.h - loadedHeight - interfaceHeight, 0) / 2);
		}

		$box.css({top: offset.top, left: offset.left, visibility:'visible'});
		
		// this gives the wrapper plenty of breathing room so it's floated contents can move around smoothly,
		// but it has to be shrank down around the size of div#colorbox when it's done.  If not,
		// it can invoke an obscure IE bug when using iframes.
		$wrap[0].style.width = $wrap[0].style.height = "9999px";
		
		function modalDimensions() {
			$topBorder[0].style.width = $bottomBorder[0].style.width = $content[0].style.width = (parseInt($box[0].style.width,10) - interfaceWidth)+'px';
			$content[0].style.height = $leftBorder[0].style.height = $rightBorder[0].style.height = (parseInt($box[0].style.height,10) - interfaceHeight)+'px';
		}

		css = {width: settings.w + loadedWidth + interfaceWidth, height: settings.h + loadedHeight + interfaceHeight, top: top, left: left};

		// setting the speed to 0 if the content hasn't changed size or position
		if (speed) {
			var tempSpeed = 0;
			$.each(css, function(i){
				if (css[i] !== previousCSS[i]) {
					tempSpeed = speed;
					return;
				}
			});
			speed = tempSpeed;
		}

		previousCSS = css;

		if (!speed) {
			$box.css(css);
		}

		$box.dequeue().animate(css, {
			duration: speed || 0,
			complete: function () {
				modalDimensions();
				
				active = false;
				
				// shrink the wrapper down to exactly the size of colorbox to avoid a bug in IE's iframe implementation.
				$wrap[0].style.width = (settings.w + loadedWidth + interfaceWidth) + "px";
				$wrap[0].style.height = (settings.h + loadedHeight + interfaceHeight) + "px";
				
				if (settings.reposition) {
					setTimeout(function () {  // small delay before binding onresize due to an IE8 bug.
						$window.bind('resize.' + prefix, publicMethod.position);
					}, 1);
				}

				if (loadedCallback) {
					loadedCallback();
				}
			},
			step: modalDimensions
		});
	};

	publicMethod.resize = function (options) {
		var scrolltop;
		
		if (open) {
			options = options || {};
			
			if (options.width) {
				settings.w = setSize(options.width, 'x') - loadedWidth - interfaceWidth;
			}

			if (options.innerWidth) {
				settings.w = setSize(options.innerWidth, 'x');
			}

			$loaded.css({width: settings.w});
			
			if (options.height) {
				settings.h = setSize(options.height, 'y') - loadedHeight - interfaceHeight;
			}

			if (options.innerHeight) {
				settings.h = setSize(options.innerHeight, 'y');
			}

			if (!options.innerHeight && !options.height) {
				scrolltop = $loaded.scrollTop();
				$loaded.css({height: "auto"});
				settings.h = $loaded.height();
			}

			$loaded.css({height: settings.h});

			if(scrolltop) {
				$loaded.scrollTop(scrolltop);
			}
			
			publicMethod.position(settings.transition === "none" ? 0 : settings.speed);
		}
	};

	publicMethod.prep = function (object) {
		if (!open) {
			return;
		}
		
		var callback, speed = settings.transition === "none" ? 0 : settings.speed;

		$loaded.empty().remove(); // Using empty first may prevent some IE7 issues.

		$loaded = $tag(div, 'LoadedContent').append(object);
		
		function getWidth() {
			settings.w = settings.w || $loaded.width();
			settings.w = settings.mw && settings.mw < settings.w ? settings.mw : settings.w;
			return settings.w;
		}
		function getHeight() {
			settings.h = settings.h || $loaded.height();
			settings.h = settings.mh && settings.mh < settings.h ? settings.mh : settings.h;
			return settings.h;
		}
		
		$loaded.hide()
		.appendTo($loadingBay.show())// content has to be appended to the DOM for accurate size calculations.
		.css({width: getWidth(), overflow: settings.scrolling ? 'auto' : 'hidden'})
		.css({height: getHeight()})// sets the height independently from the width in case the new width influences the value of height.
		.prependTo($content);
		
		$loadingBay.hide();
		
		// floating the IMG removes the bottom line-height and fixed a problem where IE miscalculates the width of the parent element as 100% of the document width.
		
		$(photo).css({'float': 'none'});

		callback = function () {
			var total = $related.length,
				iframe,
				frameBorder = 'frameBorder',
				allowTransparency = 'allowTransparency',
				complete;
			
			if (!open) {
				return;
			}
			
			function removeFilter() { // Needed for IE7 & IE8 in versions of jQuery prior to 1.7.2
				if ($.support.opacity === false) {
					$box[0].style.removeAttribute('filter');
				}
			}
			
			complete = function () {
				clearTimeout(loadingTimer);
				$loadingOverlay.hide();
				trigger(event_complete, settings.onComplete);
			};

			
			$title.html(settings.title).add($loaded).show();
			
			if (total > 1) { // handle grouping
				if (typeof settings.current === "string") {
					$current.html(settings.current.replace('{current}', index + 1).replace('{total}', total)).show();
				}
				
				$next[(settings.loop || index < total - 1) ? "show" : "hide"]().html(settings.next);
				$prev[(settings.loop || index) ? "show" : "hide"]().html(settings.previous);
				
				slideshow();
				
				// Preloads images within a rel group
				if (settings.preloading) {
					$.each([getIndex(-1), getIndex(1)], function(){
						var src,
							img,
							i = $related[this],
							data = $.data(i, colorbox);

						if (data && data.href) {
							src = data.href;
							if ($.isFunction(src)) {
								src = src.call(i);
							}
						} else {
							src = $(i).attr('href');
						}

						if (src && isImage(data, src)) {
							src = retinaUrl(data, src);
							img = document.createElement('img');
							img.src = src;
						}
					});
				}
			} else {
				$groupControls.hide();
			}
			
			if (settings.iframe) {
				iframe = $tag('iframe')[0];
				
				if (frameBorder in iframe) {
					iframe[frameBorder] = 0;
				}
				
				if (allowTransparency in iframe) {
					iframe[allowTransparency] = "true";
				}

				if (!settings.scrolling) {
					iframe.scrolling = "no";
				}
				
				$(iframe)
					.attr({
						src: settings.href,
						name: (new Date()).getTime(), // give the iframe a unique name to prevent caching
						'class': prefix + 'Iframe',
						allowFullScreen : true, // allow HTML5 video to go fullscreen
						webkitAllowFullScreen : true,
						mozallowfullscreen : true
					})
					.one('load', complete)
					.appendTo($loaded);
				
				$events.one(event_purge, function () {
					iframe.src = "//about:blank";
				});

				if (settings.fastIframe) {
					$(iframe).trigger('load');
				}
			} else {
				complete();
			}
			
			if (settings.transition === 'fade') {
				$box.fadeTo(speed, 1, removeFilter);
			} else {
				removeFilter();
			}
		};
		
		if (settings.transition === 'fade') {
			$box.fadeTo(speed, 0, function () {
				publicMethod.position(0, callback);
			});
		} else {
			publicMethod.position(speed, callback);
		}
	};

	function load () {
		var href, setResize, prep = publicMethod.prep, $inline, request = ++requests;
		
		active = true;
		
		photo = false;
		
		element = $related[index];
		
		makeSettings();
		
		trigger(event_purge);
		
		trigger(event_load, settings.onLoad);
		
		settings.h = settings.height ?
				setSize(settings.height, 'y') - loadedHeight - interfaceHeight :
				settings.innerHeight && setSize(settings.innerHeight, 'y');
		
		settings.w = settings.width ?
				setSize(settings.width, 'x') - loadedWidth - interfaceWidth :
				settings.innerWidth && setSize(settings.innerWidth, 'x');
		
		// Sets the minimum dimensions for use in image scaling
		settings.mw = settings.w;
		settings.mh = settings.h;
		
		// Re-evaluate the minimum width and height based on maxWidth and maxHeight values.
		// If the width or height exceed the maxWidth or maxHeight, use the maximum values instead.
		if (settings.maxWidth) {
			settings.mw = setSize(settings.maxWidth, 'x') - loadedWidth - interfaceWidth;
			settings.mw = settings.w && settings.w < settings.mw ? settings.w : settings.mw;
		}
		if (settings.maxHeight) {
			settings.mh = setSize(settings.maxHeight, 'y') - loadedHeight - interfaceHeight;
			settings.mh = settings.h && settings.h < settings.mh ? settings.h : settings.mh;
		}
		
		href = settings.href;
		
		loadingTimer = setTimeout(function () {
			$loadingOverlay.show();
		}, 100);
		
		if (settings.inline) {
			// Inserts an empty placeholder where inline content is being pulled from.
			// An event is bound to put inline content back when Colorbox closes or loads new content.
			$inline = $tag(div).hide().insertBefore($(href)[0]);

			$events.one(event_purge, function () {
				$inline.replaceWith($loaded.children());
			});

			prep($(href));
		} else if (settings.iframe) {
			// IFrame element won't be added to the DOM until it is ready to be displayed,
			// to avoid problems with DOM-ready JS that might be trying to run in that iframe.
			prep(" ");
		} else if (settings.html) {
			prep(settings.html);
		} else if (isImage(settings, href)) {

			href = retinaUrl(settings, href);

			photo = document.createElement('img');

			$(photo)
			.addClass(prefix + 'Photo')
			.bind('error',function () {
				settings.title = false;
				prep($tag(div, 'Error').html(settings.imgError));
			})
			.one('load', function () {
				var percent;

				if (request !== requests) {
					return;
				}

				$.each(['alt', 'longdesc', 'aria-describedby'], function(i,val){
					var attr = $(element).attr(val) || $(element).attr('data-'+val);
					if (attr) {
						photo.setAttribute(val, attr);
					}
				});

				if (settings.retinaImage && window.devicePixelRatio > 1) {
					photo.height = photo.height / window.devicePixelRatio;
					photo.width = photo.width / window.devicePixelRatio;
				}

				if (settings.scalePhotos) {
					setResize = function () {
						photo.height -= photo.height * percent;
						photo.width -= photo.width * percent;
					};
					if (settings.mw && photo.width > settings.mw) {
						percent = (photo.width - settings.mw) / photo.width;
						setResize();
					}
					if (settings.mh && photo.height > settings.mh) {
						percent = (photo.height - settings.mh) / photo.height;
						setResize();
					}
				}
				
				if (settings.h) {
					photo.style.marginTop = Math.max(settings.mh - photo.height, 0) / 2 + 'px';
				}
				
				if ($related[1] && (settings.loop || $related[index + 1])) {
					photo.style.cursor = 'pointer';
					photo.onclick = function () {
						publicMethod.next();
					};
				}

				photo.style.width = photo.width + 'px';
				photo.style.height = photo.height + 'px';

				setTimeout(function () { // A pause because Chrome will sometimes report a 0 by 0 size otherwise.
					prep(photo);
				}, 1);
			});
			
			setTimeout(function () { // A pause because Opera 10.6+ will sometimes not run the onload function otherwise.
				photo.src = href;
			}, 1);
		} else if (href) {
			$loadingBay.load(href, settings.data, function (data, status) {
				if (request === requests) {
					prep(status === 'error' ? $tag(div, 'Error').html(settings.xhrError) : $(this).contents());
				}
			});
		}
	}
		
	// Navigates to the next page/image in a set.
	publicMethod.next = function () {
		if (!active && $related[1] && (settings.loop || $related[index + 1])) {
			index = getIndex(1);
			launch($related[index]);
		}
	};
	
	publicMethod.prev = function () {
		if (!active && $related[1] && (settings.loop || index)) {
			index = getIndex(-1);
			launch($related[index]);
		}
	};

	// Note: to use this within an iframe use the following format: parent.jQuery.colorbox.close();
	publicMethod.close = function () {
		if (open && !closing) {
			
			closing = true;
			
			open = false;
			
			trigger(event_cleanup, settings.onCleanup);
			
			$window.unbind('.' + prefix);
			
			$overlay.fadeTo(settings.fadeOut || 0, 0);
			
			$box.stop().fadeTo(settings.fadeOut || 0, 0, function () {
			
				$box.add($overlay).css({'opacity': 1, cursor: 'auto'}).hide();
				
				trigger(event_purge);
				
				$loaded.empty().remove(); // Using empty first may prevent some IE7 issues.
				
				setTimeout(function () {
					closing = false;
					trigger(event_closed, settings.onClosed);
				}, 1);
			});
		}
	};

	// Removes changes Colorbox made to the document, but does not remove the plugin.
	publicMethod.remove = function () {
		if (!$box) { return; }

		$box.stop();
		$.colorbox.close();
		$box.stop().remove();
		$overlay.remove();
		closing = false;
		$box = null;
		$('.' + boxElement)
			.removeData(colorbox)
			.removeClass(boxElement);

		$(document).unbind('click.'+prefix);
	};

	// A method for fetching the current element Colorbox is referencing.
	// returns a jQuery object.
	publicMethod.element = function () {
		return $(element);
	};

	publicMethod.settings = defaults;

}(jQuery, document, window));

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