Refreshing / Reloading the page through Java Script

1)   To Refreshing page through Get request

<input type="button" value="Reload Page"
onClick="window.location.href=window.location.href">

2)  To Refreshing page through last request (Get or Post)

  <input type="button" value="Reload Page" onClick="window.location.reload()">

3) To reload page through browser cache 

<input type="button" value="Reload Page" onClick="history.go(0)">

4) To Refreshing Periodically

function refreshPeriodic()

{

location.reload();

timerID=setTimeout("refreshPeriodic()",30000);

}

timerID=setTimeout("refreshPeriodic()",30000);