function escapeHTML (str) {
	var val = '';
	if(typeof str === 'undefined') val = '';
	else {
		  if(typeof str === 'string'){
			  val = str.replace(/\0/g, '').trim();
		  } else {
			  val = str;
		  }
	}
	return (function() {
		var entityMap = {
			"&": "&",
			"<": "<",
			">": ">",
			'"': '"',
			"'": ''',
			"\\": '\\\\'
		};
		return String(val).replace(/[&<>"'\\]/g, function (s) {
			return entityMap[s];
		});

	})();
};