JavaScript: I am trying to use a setInterval() function to generate one message every 3 seconds -

currently running setinterval() funnction populate div new messages , attempting populate 1 @ time, current setinterval() generating multiple @ time. how can fix this?

here's code snippet:

function newmessage(){             // loop goes through emails , creats divs subject, date, sender, , body          for(var = 0; < window.geemails.length; i++ ) {              //email container             var div = document.createelement("div");              //date             var datefield = document.createelement("h1");             datefield.classname = "date";             datefield.innerhtml = window.geemails[i].date;             div.appendchild(datefield);              //subject             var subjectfield = document.createelement("h1");             subjectfield.classname = "subject";             subjectfield.innerhtml = window.geemails[i].subject;             div.appendchild(subjectfield);              //sender             var senderfield = document.createelement("h1");             senderfield.classname = "sender";             senderfield.innerhtml = window.geemails[i].sender;             div.appendchild(senderfield);              //body             var bodyfield = document.createelement("p");             bodyfield.classname = "body";             bodyfield.innerhtml = window.geemails[i].body;             div.appendchild(bodyfield);              //separate message content containers             document.getelementbyid("main").appendchild(div);              //inbox counter             document.getelementbyid('counter').innerhtml = "you have " + window.geemails.length + " messages";            }      }           newmessage();            //interval loading new messages         function addnewmessage() {             setinterval(function(){window.geemails.push(getnewmessage());newmessage();}, 3000);         }          addnewmessage(); 

//interval loading new messages function addnewmessage() {     setinterval(function () {         window.geemails.push(getnewmessage());         newmessage();     }, 3000); } 

settimeout happen once. setinterval occur every x milliseconds.

update problem code calling addnewmessage inside interval function. don't need when call setinterval.