http://stackoverflow.com/questions/15191058/css-rotation-cross-browser-with-jquery-animate里面
// (starts from `0` to `angle`), you can name it as you want
    $({deg: 0}).animate({deg: angle}, {
这句话能看明白意思，可是我死活查不到这种用法的语法出处在哪里啊？http://api.jquery.com/animate/里各种example也没提到这种语法啊
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修改:vicsa475 FROM 59.167.81.*
FROM 59.167.81.*