function popupFeedback(url) {
	window.open(url,'Feedback','toolbar=no,scrollbar=no,height=740,width=500,menubar=no,status=no,location=no')
}

function back() {
	history.go(-1)
}

function popupBroken(url) {
	window.open(url,'Feedback','toolbar=no,scrollbar=no,height=310,width=500,menubar=no,status=no,location=no')
}