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javascript:(function(xpaths,doc,hst,stl,sel,lnks,i,a_lnk,the_lnk,post){xpaths={'twitter.com':{'lnk':'./ancestor-or-self::a[contains(@class,"tweet-timestamp")or contains(@class,"details")]','post':'./ancestor::li[contains(@class,"stream-item")]'},'vk.com':{'lnk':'./ancestor-or-self::a[descendant::span[contains(@class,"rel_date")]and not(contains(@class,"wd_lnk"))]','post':'./ancestor::div[contains(@class,"feed_row")or contains(@class,"post")and not(@id="page_wall_posts")]'},'m.livejournal.com':{'lnk':'./ancestor-or-self::a[ancestor::h3[contains(@class,"item-header")]]','post':'./ancestor::li[contains(@class,"post-list-item")]'},'www.facebook.com':{'lnk':'./ancestor-or-self::a[descendant::abbr[@data-utime]]','post':'./ancestor::div[contains(@class,"_5jmm")and contains(@class,"_5pat")and contains(@class,"_5uch")]'}};doc=document;hst=doc.location.hostname;if(xpaths[hst]){if(!doc.querySelector('style#usernameReadPost')){stl=doc.querySelector('head').appendChild(doc.createElement('style'));stl.id='usernameReadPost';stl.innerHTML='.usernameReadPost,.usernameReadPost~*{background-color:silver !important;}';}sel=doc.getSelection();if(sel.isCollapsed){lnks=doc.querySelectorAll('a[href$="'+localStorage.getItem('usernameReadPost')+'"]');for(i=0,a_lnk;a_lnk=lnks[i];i++){the_lnk=doc.evaluate(xpaths[hst].lnk,a_lnk,null,XPathResult.FIRST_ORDERED_NODE_TYPE,null).singleNodeValue;if(the_lnk){post=doc.evaluate(xpaths[hst].post,the_lnk,null,XPathResult.FIRST_ORDERED_NODE_TYPE,null).singleNodeValue;break;}}if(post){post.className+=' usernameReadPost';}else{alert('Read post not found.');}}else{the_lnk=doc.evaluate(xpaths[hst].lnk,sel.focusNode,null,XPathResult.FIRST_ORDERED_NODE_TYPE,null).singleNodeValue;if(the_lnk){post=doc.evaluate(xpaths[hst].post,the_lnk,null,XPathResult.FIRST_ORDERED_NODE_TYPE,null).singleNodeValue;post.className+=' usernameReadPost';localStorage.setItem('usernameReadPost',the_lnk.getAttribute('href'));}else{alert('Wrong link.');}}}else{alert('Wrong hostname.');}})()
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