Possible Duplicate:

Formatting a date in JavaScript

I have the following piece of script. It's a HTML5 slider with a date range. The slider is using a unix timestamp and I want to display the current selection in a readable format.

This is working fine but is outputting as Wed May 16 2012 08:07:30 GMT+0100 (GMT Daylight Time) despite me specifying the format as yyyy-MM-dd HH:mm:ss.

Any ideas why it's not outputting in my format?

<input id=slider3 type=range min=1337149800 max=1337160600

  step=450 onchange=printValue('slider3','rangeValue3')/>

<input id=rangeValue3 type=text size=90/>



<script>

function printValue(sliderID, textbox) {

  var x = document.getElementById(textbox);

  var y = document.getElementById(sliderID);



  var d1=new Date(y.value*1000);



  var newtimestamp = d1.toString(yyyy-MM-dd HH:mm:ss);



  x.value = newtimestamp;

}

</script>