Focus in popup

[Asia82]

Questo è il codice che uso come lo modifico per fare il focus sulla finestra?

function handlehHttpReceiveChat() {
    currentDest = document.forms['chatForm'].elements['dest'].value;
    currentName = document.forms['chatForm'].elements['name'].value;

  if (httpReceiveChat.readyState == 4) {
    results = httpReceiveChat.responseText.split('---'); //the fields are seperated by ---
    if (results.length > 2) {
        for(i=0;i < (results.length-1);i=i+3) { //goes through the result one message at a time
            insertNewContent(results[i+1],results[i+2]); //inserts the new content into the page
            
        }
        lastID = results[results.length-4];
        //window.open('http://www.spritzlandia.it/chat.php?dest=' + currentDest,'miaFinestra','');
    }
    setTimeout('receiveChatText();',4000); //executes the next data query in 4 seconds
  }
}