javascript: indesign progress bar

gistfile1

function index_progress_bar(title) {
	var w = new  Window("palette", title, undefined);
		w.orientation = "column";
	var text_group = w.add("group");
		text_group.orientation = "column";
	var	file_name = text_group.add("statictext", [0,0,350,20], "calculating..");
	var remain = text_group.add("statictext", [0,0,350,20], "Remain: ..");
		text_group.alignChildren = "left";
	var progressbar = w.add("progressbar", undefined, 0, 100);
		progressbar.preferredSize = [350,20];  	

	this.reset = function(maxValue) {		
		progressbar.value = 0;
		progressbar.maxvalue = maxValue||0;
		progressbar.visible = !!maxValue;
		w.show();		
	};
	
	this.show = function(name, remain_string, value) {
		file_name.text = name;
		remain.text = remain_string;
		progressbar.value = value;
	};
	
	this.hide = function() {w.hide();};
	this.close = function() {w.close();};	
};