End script using extendscript.

Hi,

How to end the script using extendscript in framemaker ? I have attached below code.It will not "Exit".Please suggests if any ideas.

var oDoc = app.ActiveDoc;

var frameDocumentName = oDoc.Name;

    if (frameDocumentName == null) {

       alert("Please open a document before running this script.");

}

main();

function main() {  

    getFileName(framemakerFolder);

    CreateWindow();

    pageCount = CountPage(oDoc);

}