It all depends on where the 'target' attribute of your form tag is pointing at. The Easiest way is to point the form tag at the script that generates the 'messagebox' in the main window, which will add the entry and cause it to refresh on the viewers screen and so forth, and then just use a bit of javascript magic, something like onSubmit=document.forms[0].chat.value='' Actually the best/easiest thing is to just go get a java one.