encodeHTMLComponent.js

// a suggestion to Objective-J for better performance

var HTMLEntities = {
	'&': '&',
	'"': '"',
	"'": ''',
	'<': '&lt;',
	'>': '&gt;'
};

for (var c in HTMLEntities) HTMLEntities[HTMLEntities[c]] = c;

var replacer = function(match){
	return HTMLEntities[match];
};

var _encodeHTMLComponent = function(aString){
	return aString.replace(/[&"'<>]/g, replacer);
};
 
var _decodeHTMLComponent = function(aString){
    return aString.replace(/&(?:amp|quot|apos|lt|gt);/g, replacer);
};