var s=document.getElementsByTagName("script");
var t=s[s.length-1];
var i=document.createElement("iframe");
i.src=t.src+"init.php?chatbox_id=" + chatbox_id + "&chatbox_width="  + chatbox_width + "&chatbox_height=" + chatbox_height;
i.width=chatbox_width;
i.height=chatbox_height;
i.vspace=0;
i.hspace=0;
i.allowTransparency="true";
i.scrolling="no";
i.marginWidth=0;
i.marginHeight=0;
i.frameBorder=0;
i.style.border=0;
t.parentNode.appendChild(i);