function - statement of language JavaScript

Description:

Function declaration.

A function is a JavaScript procedure — a set of statements that performs a task or calculates a value. To use a function, you must define it somewhere in the scope from which you wish to call it.

Syntax:

function name(par1, par2, ...)

{

statement1

statement2

...

}

Note:

Functions declared with function in the procedure are available only within the procedure.

Example1:

Function definition and calling

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function Sum(a, b)
{
	return a + b;
}

var c = Sum(1, 2);

Example2:

Declaration of the OnTick function by method AddEventTimer with repeated calling terminated after 10 cycles.

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function OnTick()
{
	Pm.Debug("nCounter = " + nCounter);
	if (nCounter-- < 0)
		pMe.Root.RemoveEventTimer(OnTick);
}
var nCounter = 10;
pMe.Root.AddEventTimer(1000, -1, OnTick);

Example3:

Adding a function into the onAction event of the PmfButton object.

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function OnButtonUp(ev)
{
	if (ev.Action == "main")
		Pm.Debug("Click UP");
}
var oForm = pMe.Form;
var oBtn1 = oForm.CreateItem("button", "btn1");
oBtn1.AddEvent("onAction", OnButtonUp);

Example4:

The same example as Example3 but the function is not named and declared in advance. It is created on the point of entry (this can be used only with simple functions).

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var oForm = pMe.Form;
var oBtn1 = oForm.CreateItem("button", "btn1");
oBtn1.AddEvent("onAction", function(ev) { if (ev.Action == "main") Pm.Debug("Click UP"); });