var aWindow;
function openWin (URL)
{
  var sOptions;
  var iHeight = 570;
  var iWidth  = 570;
  if(aWindow!=null && !aWindow.closed){ // if popUp has been opened, and popUp hasn't already been closed
    aWindow.close() //close it in order to re-assign properties
  }
 
  sOptions = 'toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,titlebar=0,top=,left=,height=' + iHeight + ',width=' + iWidth;
  aWindow = window.open (URL, 'windowname', sOptions);
 
  aWindow.focus();
}
function openWind (URL)
{
  var sOptions;
  var iHeight = 570;
  var iWidth  = 570;
  if(aWindow!=null && !aWindow.closed){ // if popUp has been opened, and popUp hasn't already been closed
    aWindow.close() //close it in order to re-assign properties
  }
 
  sOptions = 'toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,titlebar=0,top=0,left=0,height=' + iHeight + ',width=' + iWidth;
  aWindow = window.open (URL, 'windowname', sOptions);
 
  aWindow.focus();
}