// ==UserScript==
// @name Highlight Words
// @author bpm
// @version 1.1
// @description Highlights works from an array
// @include https://www.examplesite.com/*
// ==/UserScript==
// 1.1 Updated by Frenzie, added easy to configure wordlist
(function () {
var wordlist=[
/@Wordlist (quote properly and use commas between values)@string@/

"word 1",
"word 2",
"word 3",
"word 4",

/@/
];
// other config
var highlightBgColor = /@Highlight background color@string@/'grey'/@/;
var highlightColor = /@Highlight font color@string@/'grey'/@/;

function hilite(text){
	var count=0,dv;
	dv=document.defaultView;
	function searchWithinNode(node,te,len){
		var pos,skip,spannode,middlebit,endbit,middleclone;
		skip=0;
		if(node.nodeType==3){
			pos=node.data.toUpperCase().indexOf(te);
			if(pos>=0){
				spannode=document.createElement('SPAN');
				spannode.style.backgroundColor=highlightBgColor;
				spannode.style.color=highlightColor;
				spannode.style.fontWeight='bold';
				middlebit=node.splitText(pos);
				endbit=middlebit.splitText(len);
				middleclone=middlebit.cloneNode(true);
				spannode.appendChild(middleclone);
				middlebit.parentNode.replaceChild(spannode,middlebit);
				++count;
				skip=1;
			}
		}
		else if(node.nodeType==1&& node.childNodes && node.tagName.toUpperCase()!='SCRIPT' && node.tagName.toUpperCase!='STYLE'){
			for (var child=0;child<node.childNodes.length;++child){
				child=child+searchWithinNode(node.childNodes[child],te,len);
			}
		}
	return skip;
	}
	searchWithinNode(document.body,text.toUpperCase(),text.length);
}

document.addEventListener('DOMContentLoaded',function() {
	for (i=0; i<wordlist.length; i++) {
		hilite(wordlist[i]);
	}
}, false);

})();