// openDocumentConditional.jsx
// Copyright 2007
// Written by Jeffrey Tranberry
// Photoshop for Geeks Version 1.0

/* 
Description:
This script demonstates how create a conditional function
*/

// enable double clicking from the 
// Macintosh Finder or the Windows Explorer
#target photoshop

// Make Photoshop the frontmost application
// in case we double clicked the file
app.bringToFront();


///////////////////////////
//         MAIN          //
///////////////////////////

// run the open documents conditional
openDocumentsConditional();


///////////////////////////
//       FUNCTIONS       //
///////////////////////////

function openDocumentsConditional(){
	// Because we are doing a for loop later in the
	// script that processes all open documents
	// we don't want to have any documents open that
	// we don't want accidentally processed. Warn the 
	// user if they have an open document and exit 
	// the script with return
	if (app.documents.length > 0){
		alert ("This script requires that there are no open documents to run.");
	return;
	}
	
	// the condition is false, so there are
	// no open documents
	alert("There are no open documents.");
}