Simple Google Plus comments cleaner

jigajiga.user.js

// ==UserScript==
// @name hidePlusKomrads
// @description Script to hide comments
// @author Tsumugi Kotobuki
// @license MIT
// @version 0.01
// @include https://plus.google.com/*
// ==/UserScript==

(function (window, undefined) { 
    var w;
    if (typeof unsafeWindow != undefined) {
        w = unsafeWindow
    } else {
        w = window;
    }

if(document.getElementsByClassName) {

	getElementsByClass = function(classList, node) {    
		return (node || document).getElementsByClassName(classList)
	}

} else {

	getElementsByClass = function(classList, node) {			
		var node = node || document,
		list = node.getElementsByTagName('*'), 
		length = list.length,  
		classArray = classList.split(/\s+/), 
		classes = classArray.length, 
		result = [], i,j
		for(i = 0; i < length; i++) {
			for(j = 0; j < classes; j++)  {
				if(list[i].className.search('\\b' + classArray[j] + '\\b') != -1) {
					result.push(list[i])
					break
				}
			}
		}
	
		return result
	}
}

sec = function() {
	var div = document.getElementById("contentPane")
	elements = getElementsByClass('Se Eu', div)
	for (var i = 0; i < elements.length; i++) {
		if(elements[i].style.cssText == '') {
			elements[i].setAttribute('style', 'display: none;');
		}
	}
}

    if (w.self != w.top) {
        return;
    }

    if (/https:\/\/plus.google.com/.test(w.location.href)) {
	    sec();
	    setInterval(sec, 2000);
    }
})(window);

Hm. Looks like schoolboy coding style, sorry.

@MaximRussia Tsumugi is obviously a girl.