encodeURI,encodeURIComponent,escape()

转自 http://stackoverflow.com/questions/75980/when-are-you-supposed-to-use-escape-instead-of-encodeuri-encodeuricomponent
escape()
Don't use it, as it has been deprecated since ECMAScript v3.
encodeURI()
Use encodeURI when you want a working URL. Make this call:
encodeURI("http://www.google.com/a file with spaces.html")

to get:
http://www.google.com/a%20file%20with%20spaces.html
Don't call encodeURIComponent since it would destroy the URL and return
http%3A%2F%2Fwww.google.com%2Fa%20file%20with%20spaces.html
encodeURIComponent()
Use encodeURIComponent when you want to encode a URL parameter.
param1 = encodeURIComponent("http://xyz.com/?a=12&b=55")

Then you may create the URL you need:
url = "http://domain.com/?param1=" + param1 + "¶m2=99";

And you will get this complete URL:
http://www.domain.com/?param1=http%3A%2F%2Fxyz.com%2F%Ffa%3D12%26b%3D55¶m2=99

Note that encodeURIComponent does not escape the ' character. A common bug is to use it to create html attributes such as href='MyUrl'
, which could suffer an injection bug. If you are constructing html from strings, either use " instead of ' for attribute quotes, or add an extra layer of encoding (' can be encoded as %27).
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