function chat()
{
	LeftPosition=(screen.width)?(screen.width-585)/2:100;
	TopPosition=(screen.height)?(screen.height-390)/2:100;
	settings='width=585,height=390,top=' + TopPosition + ',left=' + LeftPosition + ',location=no,directories=no,menubar=no,toolbar=no,status=no,scrollbars=yes,resizable=no,dependent=no';
	javascriptWindow=window.open('','Preview',settings);
	javascriptWindow.focus();
	javascriptWindow.location='http://telcoblue.com.au/chat/choosedepartment.php';
}