In JavaScript you can add special characters to a text string by using the backslash sign.
使用backslash( \ 反斜杠)标记你可以在JS中添加特殊文字。

Insert Special Characters
插入特殊文字

The backslash () is used to insert apostrophes, new lines, quotes, and other special characters into a text string.
(\ 反斜杠)被用来插入省略符号，新的行，引用和其他插入在字符串中的特殊文字。

Look at the following JavaScript code:
请看下面的JS代码：

var txt="We are the so-called "Vikings" from the north."

document.write(txt)

In JavaScript, a string is started and stopped with either single or double quotes. This means that the string above will be chopped to: We are the so-called
在JS中，一字符串可以用单引号或是双引号来开始和结束。这就意味着上面的字符串将被切成：We are the so-called

To solve this problem, you must place a backslash (\) before each double quote in "Viking". This turns each double quote into a string literal:
要解决这个问题，你必须在"Viking"的每个双引号前放置一个\ (反斜杠)。这样就能在字符串中正确返回每个双引号了：

var txt="We are the so-called "Vikings" from the north."
document.write(txt)

JavasScript will now output the proper text string: We are the so-called "Vikings" from the north.
现在JS就能输出合适的文字了： We are the so-called "Vikings" from the north.

Here is another example:
这是另外一个例子：

document.write ("You & me are singing!") 

The example above will produce the following output:
上面的例子会输出下面的内容：

You & me are singing!

The table below lists other special characters that can be added to a text string with the backslash sign:
下面的表格罗列了其他一些特殊文字：

JS onerror JS Guidelines

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