function popup(src){

	w = 500;
	h = 400;

	type = arguments[1];
	if(type == "image"){
		iw = (arguments[2])? arguments[2]+20 : w;
		ih = (arguments[3])? arguments[3]+20 : h;

		iw = (screen.width < iw)? screen.width : iw;
		ih = (screen.height < ih)? screen.height : ih;

		param = "width=" + iw + ",height=" + ih + ",resizable=yes,scrollbars=yes";
		nw = window.open(src,'',param);
		return;
	}

	if(type){
		nw = window.open(src,'',type);
	}else{
		nw = window.open(src,'','width=' + w + ',height=' + h + ',resizable=yes,menubar=yes,status=yes');
	}

}