/*
        This example demonstrates how to create a simple expression-like scripted operator
        to constrain the posx of an object to its posy value
*/
NewScene(null, false);
var obj = Application.ActiveSceneRoot.AddNull();
// Create script file on disk
var filename = Application.InstallationPath( siUserPath ) + "\\Data\\Scripts\\myexpr_sop.js";
var fso = new ActiveXObject( "Scripting.FileSystemObject" );
var f = fso.CreateTextFile( filename, true );
f.Write( myexpr_Update.toString() );
f.Close();
// Apply scripted operator
obj.posx.AddScriptedOpFromFile( filename, obj.posy, "myexpr", "JScript" );
// Expression Update function
function myexpr_Update( ctx, out, inposy )
{
        out.Value = inposy;
}