function windowOpener(url, name, args) {
if(typeof(popupWin) != "object" || popupWin.closed) {
popupWin = window.open(url,name,args);
} else {
if (name!=popupWin.name){
popupWin.close();
popupWin = window.open(url,name,args);
}
}
popupWin.focus();
return popupWin;
}