Refresh a Dashboard in intervals

Hi you can refresh a dashboard in intervals using the following code

Insert a text box onto the Dashboard - "Contains HTML"

Paste the following code into the textbox and save

<script>
<!--
var sec="180" // Seconds
function refpage(){
if (sec==0)
HereLink('','RefreshAll');
else {
window.status="Refreshing in "sec--" seconds"
setTimeout("refpage()",1000)
}
}
window.onload=refpage
//-->
</script>