// Basic PopUp functions

var _POPUP_FEATURES = 'toolbar=no, location=no, statusbar=no, menubar=no, scrollbars=yes, resizable=no, width=550, height=560,screenX=150,screenY=150,top=150,left=150';


function isUndefined(a) { return typeof a == 'undefined' }

function raw_popup(url, target, features) {
    if (isUndefined(features)) features = _POPUP_FEATURES;
    if (isUndefined(target  )) target   = '_blank';
    var theWindow = window.open(url, target, features);
    theWindow.focus();
    return theWindow;
}

function open_popup(src, features) {
    return raw_popup(src.getAttribute('href'), src.getAttribute('target') || '_blank', features);
}