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-/*jslint white: true, indent: 2, onevar: false, browser: true, undef: true, nomen: false, eqeqeq: true, plusplus: false, bitwise: true, regexp: true, strict: false, newcap: true, immed: true */
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-/*global window, console, jQuery, setTimeout */
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-
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-/*
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- Plugin: iframe autoheight jQuery Plugin
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- Version: 1.9.5
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- Author and Contributors
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- ========================================
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- NATHAN SMITH (http://sonspring.com/)
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- Jesse House (https://github.com/house9)
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- aaron manela (https://github.com/aaronmanela)
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- Hideki Abe (https://github.com/hideki-a)
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- Patrick Clark (https://github.com/hellopat)
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- ChristineP2 (https://github.com/ChristineP2)
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- Mmjavellana (https://github.com/Mmjavellana)
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- yiqing-95 (https://github.com/yiqing-95)
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- jcaspian (https://github.com/jcaspian)
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- adamjgray (https://github.com/adamjgray)
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- Jens Bissinger (https://github.com/dpree)
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- jbreton (https://github.com/jbreton)
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- mindmelting (https://github.com/mindmelting)
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-
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- File: jquery.iframe-auto-height.plugin.js
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- Remarks: original code from http://sonspring.com/journal/jquery-iframe-sizing
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- Description: when the page loads set the height of an iframe based on the height of its contents
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- see README: http://github.com/house9/jquery-iframe-auto-height
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-
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-*/
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-(function ($) {
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- $.fn.iframeAutoHeight = function (spec) {
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-
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- var undef;
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- if ($.browser === undef) {
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- var message = [];
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- message.push("WARNING: you appear to be using a newer version of jquery which does not support the $.browser variable.");
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- message.push("The jQuery iframe auto height plugin relies heavly on the $.browser features.");
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- message.push("Install jquery-browser: https://raw.github.com/house9/jquery-iframe-auto-height/master/release/jquery.browser.js");
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- alert(message.join("\n"));
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- return $;
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- }
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-
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- // set default option values
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- var options = $.extend({
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- heightOffset: 0,
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- minHeight: 0,
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- maxHeight: 0,
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- callback: function (newHeight) {},
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- animate: false,
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- debug: false,
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- diagnostics: false, // used for development only
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- resetToMinHeight: false,
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- triggerFunctions: [],
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- heightCalculationOverrides: []
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- }, spec);
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-
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- // logging
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- function debug(message) {
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- if (options.debug && options.debug === true && window.console) {
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- console.log(message);
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- }
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- }
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-
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- // not used by production code
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- function showDiagnostics(iframe, calledFrom) {
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- debug("Diagnostics from '" + calledFrom + "'");
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- try {
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- debug(" " + $(iframe, window.top.document).contents().find('body')[0].scrollHeight + " for ...find('body')[0].scrollHeight");
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- debug(" " + $(iframe.contentWindow.document).height() + " for ...contentWindow.document).height()");
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- debug(" " + $(iframe.contentWindow.document.body).height() + " for ...contentWindow.document.body).height()");
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- } catch (ex) {
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- // ie fails when called during for each, ok later on
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- // probably not an issue if called in a document ready block
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- debug(" unable to check in this state");
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- }
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- debug("End diagnostics -> results vary by browser and when diagnostics are requested");
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- }
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-
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- // show all option values
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- debug(options);
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-
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- // ******************************************************
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- // iterate over the matched elements passed to the plugin ; return will make it chainable
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- return this.each(function () {
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-
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- // ******************************************************
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- // http://api.jquery.com/jQuery.browser/
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- var strategyKeys = ['webkit', 'mozilla', 'msie', 'opera'];
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- var strategies = {};
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- strategies['default'] = function (iframe, $iframeBody, options, browser) {
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- // NOTE: this is how the plugin determines the iframe height, override if you need custom
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- return $iframeBody[0].scrollHeight + options.heightOffset;
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- };
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-
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- jQuery.each(strategyKeys, function (index, value) {
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- // use the default strategy for all browsers, can be overridden if desired
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- strategies[value] = strategies['default'];
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- });
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-
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- // override strategies if registered in options
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- jQuery.each(options.heightCalculationOverrides, function (index, value) {
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- strategies[value.browser] = value.calculation;
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- });
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-
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- function findStrategy(browser) {
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- var strategy = null;
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-
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- jQuery.each(strategyKeys, function (index, value) {
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- if (browser[value]) {
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- strategy = strategies[value];
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- return false;
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- }
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- });
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-
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- if (strategy === null) {
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- strategy = strategies['default'];
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- }
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-
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- return strategy;
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- }
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- // ******************************************************
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-
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- // for use by webkit only
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- var loadCounter = 0;
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-
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- var iframeDoc = this.contentDocument || this.contentWindow.document;
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-
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- // resizeHeight
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- function resizeHeight(iframe) {
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- if (options.diagnostics) {
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- showDiagnostics(iframe, "resizeHeight");
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- }
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-
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- // set the iframe size to minHeight so it'll get smaller on resizes in FF and IE
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- if (options.resetToMinHeight && options.resetToMinHeight === true) {
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- iframe.style.height = options.minHeight + 'px';
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- }
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-
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- // get the iframe body height and set inline style to that plus a little
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- var $body = $(iframe, window.top.document).contents().find('body');
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- var strategy = findStrategy($.browser);
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- var newHeight = strategy(iframe, $body, options, $.browser);
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- debug(newHeight);
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-
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- if (newHeight < options.minHeight) {
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- debug("new height is less than minHeight");
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- newHeight = options.minHeight;
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- }
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-
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- if (options.maxHeight > 0 && newHeight > options.maxHeight) {
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- debug("new height is greater than maxHeight");
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- newHeight = options.maxHeight;
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- }
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-
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- newHeight += options.heightOffset;
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-
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- debug("New Height: " + newHeight);
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- if (options.animate) {
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- $(iframe).animate({height: newHeight + 'px'}, {duration: 500});
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- } else {
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- iframe.style.height = newHeight + 'px';
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- }
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-
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- options.callback.apply($(iframe), [{newFrameHeight: newHeight}]);
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- } // END resizeHeight
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-
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- // debug me
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- debug(this);
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- if (options.diagnostics) {
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- showDiagnostics(this, "each iframe");
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- }
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-
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- // if trigger functions are registered, invoke them
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- if (options.triggerFunctions.length > 0) {
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- debug(options.triggerFunctions.length + " trigger Functions");
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- for (var i = 0; i < options.triggerFunctions.length; i++) {
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- options.triggerFunctions[i](resizeHeight, this);
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- }
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- }
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-
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- // Check if browser is Webkit (Safari/Chrome) or Opera
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- if ($.browser.webkit || $.browser.opera || $.browser.chrome) {
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- debug("browser is webkit or opera");
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-
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- // Start timer when loaded.
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- $(this).load(function () {
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- var delay = 0;
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- var iframe = this;
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-
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- var delayedResize = function () {
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- resizeHeight(iframe);
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- };
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-
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- if (loadCounter === 0) {
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- // delay the first one
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- delay = 500;
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- } else {
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- // Reset iframe height to 0 to force new frame size to fit window properly
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- // this is only an issue when going from large to small iframe, not executed on page load
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- iframe.style.height = options.minHeight + 'px';
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- }
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-
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- debug("load delay: " + delay);
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- setTimeout(delayedResize, delay);
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- loadCounter++;
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- });
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-
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- // Safari and Opera need a kick-start.
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- var source = $(this).attr('src');
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- $(this).attr('src', '');
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- $(this).attr('src', source);
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- } else {
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- // For other browsers.
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- if(iframeDoc.readyState === 'complete') {
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- resizeHeight(this);
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- } else {
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- $(this).load(function () {
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- resizeHeight(this);
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- });
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- }
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- } // if browser
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-
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- }); // $(this).each(function () {
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- }; // $.fn.iframeAutoHeight = function (options) {
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-}(jQuery)); // (function ($) {
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