Native js onclick event automatically trigger

Without further ado, directly on the code! 

<div id = "btn" οnclick = "tip ( ' pop')"> Trigger onclick </ div>
 <script type="text/javascript">
function tip (msg){
    alert(msg);
}
// three seconds to simulate a click 
the setTimeout ( function () {
     // IEs browser 
    IF (the document.all) {
        document.getElementById("clickMe").click();
    }
    // other browsers 
    the else {
         var E = document.createEvent ( "MouseEvents" );
        e.initEvent("click", true, true);
        document.getElementById("btn").dispatchEvent(e);
    }
}, 3000);
</script>