static variables and functions

When a function is defined, the “.” attributes and functions that are added by the dot are still accessible through the object itself, but its instance is not accessible, and such variables and functions are called and respectively 静态变量 静态函数 .

<Scripttype= "Text/javascript" > function obj  () {}; Obj.num = 72; Static variable Obj.fn = function ()//static function {} alert (obj.num); //72 alert (typeof Obj.fn) // function var t = new Obj (); alert (t.name); //undefined alert (typeof T.fn); </SCRIPT>       

Static variables and functions