function popUpWindow(theURL,winName,wdt,hgt) { 
    if(typeof(theWindow)=='undefined' ) {
        theWindow = window.open(theURL,winName,'width='+wdt+',height='+hgt+',scrollbars=auto,location=no,menubar=no,toolbar=no,status=no,resizable=yes'); 
	} else if (theWindow.closed) {
		delete theWindow;
		theWindow = window.open(theURL,winName,'width='+wdt+',height='+hgt+',scrollbars=auto,location=no,menubar=no,toolbar=no,status=no,resizable=yes'); 
	}
	theWindow.focus();
	return theWindow;
}