Display recent 5 values in Javascript

<script>
var my = new Array();
function addMe() {
var n = document.getElementById("name").value; 
if  (my.length < 5) {
my.push(n);
}  else {
for  (var i = 0; i < my.length; i++)  {
if  (i  ==  my.length-1 )  {  
my.splice(i,1,n);
} else {
my.splice(i,1,my[i+1]);
}
}
}
var str = "";
for (var i = 0; i < my.length; i++) {
str += my[i] + "  ";
}
document.getElementById("display").innerHTML = "";
document.getElementById("name").value = "";
document.getElementById("display").innerHTML = str;


}
</script>
 
Name: <input id="name" name="name" type="text" /> 


<input onclick="addMe()" type="button" value="Add" />