siccome non sono molto pratico e la tua spiegazione non mi è molto chiara, ti passo pure il file .js da modificare, ti sarei molto grato se lo lavorassi come necessario.. la parte html credo di essere in grado ma con questo js veramente non ci vado d'accordo:quipy:

grazie cmq

function popupChat() {
win=window.open("popup.html", "JPilotChat",
"height=220,width=520");
}


function send()
{
if (document.UserInfo.NICKNAME.value == null ||
document.UserInfo.NICKNAME.value == "")
{
window.alert("Enter a NickName")
return false
}

var USERNICK = document.UserInfo.NICKNAME.value

win=window.open("","IRC","resizable=no,height=400, width=800")
win.document.write('<html><head><title>The54.com IRC Web-Client</title></head>')
win.document.write('<body bgcolor="#6484B5">')

win.document.write('<applet archive="jirc_nss.zip" code=Chat.class height=382 width=782>')

win.document.write('<param name="CABBASE" value="jirc_mss.cab">');
win.document.write('<param name="ServerPort" value="6667">')
win.document.write('<param name="ServerName1" value="irc.azzurra.org">')
win.document.write('<param name="ServerName2" value="irc.quakenet.org">')
win.document.write('<param name="Channel1" value="the54">')
win.document.write('<param name="AllowURL" value="true">')
win.document.write('<param name="AllowIdentd" value="true">')
win.document.write('<param name="WelcomeMessage" value="Welcome to The54 WebChat!">')
win.document.write('<param name="RealName" value="the54 WebChat User">')
win.document.write('<param name="NickName" value="'+USERNICK+'">')
win.document.write('<param name="UserName" value="The54">')
win.document.write('<param name="isLimitedServers" value="true">')
win.document.write('<param name="isLimitedChannels" value="true">')
win.document.write('<param name="MessageCol" value="80">')
win.document.write('<param name="BackgroundColor" value="100,132,181">')
win.document.write('<param name="TextColor" value="black">')
win.document.write('<param name="TextScreenColor" value="white">')
win.document.write('<param name="ListTextColor" value="blue">')
win.document.write('<param name="ListScreenColor" value="white">')
win.document.write('<param name="TextFontName" value="Arial">')
win.document.write('<param name="TextFontSize" value="12">')
win.document.write('<param name="DirectStart" value="true"> ')
win.document.write('<param name="FGColor" value="black">')

win.document.write('<param name="IgnoreMOTD" value="true">')
win.document.write('<param name="AcceptCommands" value="false">')
win.document.write('<param name="DisplayConfigChannel" value="false">')
win.document.write('<param name="DisplayConfigRealName" value="false">')
win.document.write('<param name="DisplayConfigPort" value="false">')
win.document.write('<param name="TitleBackgroundColor" value="black">')
win.document.write('<param name="TitleForegroundColor" value="white">')
win.document.write('<param name="FieldNamePrivateChatTitle" value="Private Chat with: ">')
win.document.write('<param name="FieldNameConnected" value="Connected to server, trying to login">')
win.document.write('')
win.document.write('')
win.document.write('')
win.document.write('')
win.document.write('')
win.document.write('')
win.document.write('')




win.document.write('</applet>')
win.document.write('</body>')
win.document.write('</html>')
win.document.close()


//document.location=document.referrer
//document.location="intro.html"

return true
}