extjs4 - Extjs. Close popup window by click not in window -

i have popup window, not modal. how can close window click on other part of page (not in window)?

something this:

function closewin(e, t) {     var el = win.getel();      if (!(el.dom === t || el.contains(t))) {         ext.getbody().un('click', closewin);         win.close();     } }  ext.getbody().on('click', closewin);