function popupWindow(page, win, widthx, heightx, scroll) {
	if (win == 'size1') {
		var widthx = 400;
		var heightx = 580;
	}
	else if (win == 'size2') {
		var widthx = 500;
		var heightx = 580;
		var scroll = true;
	}
	else if (win == 'size3') {
		var widthx = 400;
		var heightx = 300;
	}

	if (scroll == true) {
		scroll = 'yes';
	}
	else {
		scroll = 'no';
	}
	
	if (widthx > 0) {
		var centerX=(screen.width-widthx)/2;
		var centerY=(screen.height-heightx)/2;
		newWindow = window.open(page+'?lang='+lang_code,win,'height='+heightx+',width='+widthx+',top='+centerY+',left='+centerX+',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars='+scroll+',resizable=no');
	}
	else {
		newWindow = window.open(page+'?lang='+lang_code,win);
	}
	newWindow.focus();
}