I am writing a small application with clock that sicplay date and time with tenths of a second. What is the most efficient to do this ? 

I have already wrote this but I doubt that this is a good solution : 

```
var today=new Date();
var mini=today.getMilliseconds();
mini = mini %1000;

if(mini < 100) mini = 0;
else{
    mini = ""+mini;
    mini = mini.substring(0,1);
}

```