prismjs highlight your code
(http://prismjs.com/extending.html)

/*
http://prismjs.com/download.html
http://prismjs.com/test.html
*/
//js
var a = 'book';

b=function(){
	alert(123)
}

#Python3
import re
str='this is 123'
a=re.match('/\d/',str);