function nav_src_control(nav_id, nav_state, pre_str) {

	pre_string = '';
	if(pre_str) { pre_string = pre_str; }
	
	document.images[nav_id].src = pre_string + '/images/left_nav/' + nav_id + '_' + nav_state + '.gif';
	
}

function detail_Popup(url) {

	var detail_window = window.open(url, "detail_window","location=0,status=0,scrollbars=0,width=645,height=440");
	if (detail_window) {
		detail_window.focus();
	}

}