function infobox pops up a predefined message window.
string message expects a text/string value of any kind. This could be something like "ERROR 1234", etc.
string type expects a value { "warning", "info"(default), "none" } or you could leave it empty ("") which chooses default option.
(optional) string posx,posy expects a string -> number followed by type such as "100px", or "10%"; if set to "-1", or not set it will set itself as default (That is set by the correct template css).
This function should always be used with a $_GET[''] variable!
<?php
if(!empty($_GET['test']))
Infobox("This is a testing pop-up infobox.","info", "40px", "50px");
echo "<a href='".$after_link."?w=".$this_w."&test=1'>Test this and show me an infobox!</a>";
?>