about "var yahoo = window.yahoo || {}"

Discussion in 'Javascript' started by zhonghua, Jul 10, 2006.

  1. zhonghua

    zhonghua Guest

    Hi,

    Who can tell me the means of "var perf = window.perf || {}" ;

    Thanks

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    email:zhonghua@rinpak
    zhonghua, Jul 10, 2006
    #1
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  2. >
    > Who can tell me the means of "var perf = window.perf || {}" ;


    variable pref is set to window.perf if not null, else to an empty
    key,value array.

    Greetings,
    Vincent
    Vincent van Beveren, Jul 10, 2006
    #2
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  3. zhonghua

    zhonghua Guest

    ok

    Thank you very much .

    "Vincent van Beveren" <> wrote in message
    news:44b25356$0$3048$...
    >>
    >> Who can tell me the means of "var perf = window.perf || {}" ;

    >
    > variable pref is set to window.perf if not null, else to an empty
    > key,value array.
    >
    > Greetings,
    > Vincent
    zhonghua, Jul 10, 2006
    #3
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