javascript: photoshop save for web call menu

gistfile1

function RunSaveForWeb() {
	var id637 = charIDToTypeID( "slct" );
	var desc89 = new ActionDescriptor();
	var id638 = charIDToTypeID( "null" );
		var ref21 = new ActionReference();
		var id639 = charIDToTypeID( "Mn  " );
		var id640 = charIDToTypeID( "MnIt" );
		var id641 = charIDToTypeID( "Svfw" );
		ref21.putEnumerated( id639, id640, id641 );
	desc89.putReference( id638, ref21 );
	executeAction( id637, desc89, DialogModes.NO );
}