function sendmail(){
    
    // add comment to artist function
    var from = document.getElementById("txtfrom").value;
    var message = document.getElementById("txtmessage").value;
    if (from.length>0) {
      if (message.length>0) {
          xmlhttpPost("sendmail.jsp","divmail","message="+message+"&from="+from);
      } else {
          window.alert("Please type a message");
      }    
    
    } else {
          window.alert("Please capture your mail address");
        
    }
}