function go(url, bookmark) {

	if (bookmark == "") {
		window.location=url+getQueryField();
	} else {
		window.location=url+getQueryField()+bookmark;
	}
}

function getQueryField() {
	
	var id = queryField('ppref');
	if (id == "") {
		return '';
	} else {
		return '?ppref='+id;
	}

}