var already_opened;
var pop_under;

function popFile(psFileName) {
	if (!already_opened || already_opened.closed) {
		already_opened = window.open(psFileName, "popup_window", 'top=25,left=25,width=750,height=500,scrollbars=yes');
	}
	else {
		already_opened.focus();
		already_opened.location = psFileName;
	}
}

function CleanUpPage() {
  	if (already_opened && !already_opened.closed) {
  		already_opened.close();
	}
}


function popUnder() {
	myleft = (screen.width)?(screen.width-700)/2:100;
	mytop = (screen.height)?(screen.height-340)/2:100;
	settings = 'top=' + mytop + ', left=' + myleft + ', width=700, height=340, location=no, directories=no, menubar=no, toolbar=no, status=no, scrollbars=no, resizable=no, fullscreen=no';
	pop_under = window.open('pop_under.asp','pop_under_win', settings);
	pop_under.blur();
}