(function($){

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$(document).ready( function(){

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var user_agent = navigator.userAgent;

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var is_opera_edge;

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var browser = user_agent.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))/i) || [];

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var browser_name = '';

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var browser_class = '';

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if ( /trident/i.test( browser[0] ) ) {

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browser_name = 'ie';

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} else if ( browser[0] === 'Chrome' ) {

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is_opera_edge = user_agent.match(/\b(OPR|Edge)/);

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if ( is_opera_edge !== null ) {

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browser_name = is_opera_edge[0].replace('OPR', 'opera');

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}

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}

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// use navigator.appName as browser name if we were unable to get it from user_agent

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if ( '' === browser_name ) {

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if ('standalone' in window.navigator && !window.navigator.standalone) {

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browser_name = 'uiwebview';

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} else {

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browser_name = browser[0] && '' !== browser[0] ? browser[0] : navigator.appName;

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}

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}

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browser_name = browser_name.toLowerCase();

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// convert browser name to class. Some classes do not match the browser name

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switch( browser_name ) {

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case 'msie' :

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browser_class = 'ie';

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break;

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case 'firefox' :

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browser_class = 'gecko';

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break;

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default :

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browser_class = browser_name;

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break;

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}

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// add `iphone` class if browsing from iphone

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if ( user_agent.match(/iPhone/) ) {

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browser_class += ' iphone';

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}

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$( 'body' ).addClass( browser_class );

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});

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})(jQuery);

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