回车替换

textarea中回车换行问题

以前一直用
str = str.replace(/\r\n/g, "\\r\\n");

在ie和firefox中都能通过

今天突然发现在firefox中没有被替换调
于是断点跟踪了下，发现firefox中只有\n，没有\r
感觉很奇怪

以下内容来自互联网

By hitting this key, the printing head or the cursor on your screen will return to the left hand margin.
Usually hitting a Carriage Return or the "Enter" key includes a line feed,
i.e.the paper will move up one line or the cursor will drop down one line.
"Usually" does not mean always.
So check. You can usually correct the problem of not having a line feed
with a carriage return by moving a dip switch on the printer,
changing one of the parameters of the telecommunications software
program (the part where it says something about auto linefeed) or
changing the computer's operating system (by doing a "Config" or the like).
In most microcomputers, a Carriage Return is equivalent
to a "Control M," or ASCII 13. A line feed is a "Control J".

[url]http://en.wikipedia.org/wiki/Carriage_return[/url]
[url]http://en.wikipedia.org/wiki/Newline[/url]