function popWindow(theURL, theHeight, theWidth, isScrollable, isResizable, theWindowName)
{  if(theWindowName == undefined) {theWindowName = Math.round(9999 * Math.random())}
   window.open(theURL,theWindowName,'toolbar=0,location=0,directories=0,status=0,menubar=0, scrollbars=' + isScrollable + ',resizable=' + isResizable + ',width=' + theWidth + ',height=' + theHeight + ',left=' + ((screen.width - theWidth) / 2) + ',top=' + ((screen.height - theHeight) / 2) + ''); 
}