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Three ways of declaring functions in JavaScript

1. Declarative function

Function functionName (arg1, arg2) {alert (arg1+arg2);}

2. Anonymous function

Var functionName1 = new Function ("arg1", "arg2", "alert (arg1 + arg2)")

3. Direct quantity function

FunctionName2 = function (arg1, arg2) {alert (arg1 + arg2);}

Three methods of function call

FunctionName ("1", "22")

FunctionName1 ("2", "11")

FunctionName2 ("Hello", "World")

Continue to read, you can also write like this, the first experience is very good

FunctionName1.love = "Hello World!"

Alert (functionName1.love)

FunctionName1.Test = function () {alert ("Test");}

FunctionName1.Test ()

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