/**
 * opens a popup window
 */
var popUps = new Array();
var DEF_POPUP_ATTR = "width=440,height=550,left=20,top=20,scrollbars=yes,resizable=no,status=no";
var DEF_POPUP_NAME = "emb_popup";
function openChild(source, name, attributes) {
	if(!source) {
		return;
	}
	attributes = attributes || DEF_POPUP_ATTR;
	name = name || DEF_POPUP_NAME;
	if (!popUps[name] || popUps[name].closed==true) {
		window.open(source,name,attributes);
	} else {
		popUps[name].close();
		popUps[name] = window.open(source,name,attributes);
	}
}