var Win

function SendMsgFromWWW(id) {
   if ((Win)&&(navigator.appName == "Microsoft Internet Explorer")) {Win.close();}
   var width = 660
   var height = 500   
   Win = window.open('sendmsgfrom.php?id='+id,'displayWindow','width=' + width + ',height=' + height + ',top=' + ((screen.height - height)/2) + ',left=' + ((screen.width - width)/2) + ',resizable=0,scrollbars=no,menubar=no');
}