참조 : http://www.w3schools.com/js/js_special_characters.asp

자바스크립트의 문자열에서 따옴표(“)나 엠퍼세드(&)를 입력하기 위해서는 를 사용해야 합니다.

Code Outputs
single quote
double quote
& ampersand
\ backslash
n new line
r carriage return
t tab
b backspace
f form feed
예)
var txt=”We are the so-called “Vikings” from the north.” (X)
var txt=”We are the so-called “Vikings” from the north.” (O)
document.write (“You & me are singing!”)