One of these days I got here this code below, which is working perfectly. But I realized that, when it adds the host "srv" to the entered domain name, it always show the complete server address in the Input Field. Is there a way of hiddening what it does? Thanks.
<input type=button value=Replace onClick="this.form.SERVER.value=this.form.SERVER.value.replace(/^(mail.|www.|srv.)*(\w+\.\w+)/i,'srv.$2')">