You can get the advanced chatroom with this code:

For login box:

<!-- ChatRoom code created by ChattersOnline.com -->
<script language="JavaScript" src="http://www.chattersonline.com/ads/jIRC/popupcreater2.js"></script>
<script language="JavaScript">
myLogin = '<form name="ChatNow"><table width="380" border="0" 
cellspacing="0" cellpadding="0" height="60" background="http://www.chattersonline.com/ads/graphics/javachat/javachatlogin21.gif">'
+ '<tr align="right"><td height="80"><input type="hidden" name="appbg" value="89,0,179">
<input type="hidden" name="chatroomident" value="jchatter">'
+ '<input type="hidden" name="appfg" value="0,255,0"><input type="hidden" name="chan" value="--->HERE YOUR ROOMNAME<---">
<input type="hidden" name="bodycss" value="body {  background-color: #cccccc;}">'
+ '<input type="hidden" name="webs" value="--->HERE YOUR SITE NAME<---">
<input type="hidden" name="bgcolor" value="#5900B3">'
+ '<input type="hidden" name="pagecolor" value="#cccccc"><input type="hidden" name="titlecolor" value="#00ff00">'
+ '<input type="hidden" name="bordercolor" value="#000000"><input type="hidden" name="fonttype" value="Arial">'
+ '<input type="hidden" name="titlesize" value="30">
<input type="hidden" name="homepageurl" value="--->HERE YOUR HOMEPAGE URL<---">'
+ '<input type="hidden" name="textcolor" value="0,0,0"><input type="hidden" name="textareabg" value="255,255,255">'
+ '<input type="hidden" name="servcmdcolor" value="255,102,0"><input type="hidden" name="serverrorcolor" value="255,0,0">'
+ '<input type="hidden" name="usercmdcolor" value="0,0,255"><input type="hidden" name="actioncolor" value="0,153,153">'
+ '<input type="TEXT" name="nick" size="'+inputSize2+'">&nbsp;&nbsp;<br><input type="text" name="nickpass" size="'+inputSize+'">'
+ '&nbsp;<input type="button" value="Chat Now!" onClick="goChat();">&nbsp;&nbsp;</td></tr></table></form>'
document.write(myLogin);
</script>
<!-- ChatRoom created on 02/28/02 07:50 AM. -->

And with the link:

<a href="#" onClick="window.open('http://www.chattersonline.com/ads/jIRC/chatnow2.cgi?directstart=false&chan=--->ROOMNAME<---&webs=--->HERE%20YOUR%20SITE%20NAME<---%21&pagecolor=%23cccccc&titlecolor=%2300ff00&bordercolor=%23000000&bodycss=body%20%7B%20%20background-color%3A%20%23cccccc%3B%7D&bgcolor=%235900B3&fonttype=Arial&margins=leftmargin%3D0%20topmargin%3D0%20marginwidth%3D0%20marginheight%3D0&homepageurl=--->HERE YOUR HOMEPAGE URL<---&titlesize=30&chatroomident=jchatter&textcolor=0%2C0%2C0&textareabg=255%2C255%2C255&servcmdcolor=255%2C102%2C0&serverrorcolor=255%2C0%2C0&usercmdcolor=0%2C0%2C255&actioncolor=0%2C153%2C153&appbg=89%2C0%2C179&appfg=0%2C255%2C0','ChatNow','height=428,width=679'); return false;">Click to Chat!</a>

You can edit the colors and settings yourself