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1 Add  the following code to .aspx
<script>  
  function fresh() {
         {
            window.opener.document.getElementById("ControlId").click();  //ControlId -- meaning parent control
        }
<script>
2.Add the following code to .cs,if you want to refresh master page control.
ScriptManager.RegisterStartupScript(Page, Page.GetType(), Guid.NewGuid().ToString(), "fresh(');", true);


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ÀëÏßʼþ(Online and offline events):
https://developer.mozilla.org/En/Online_and_offline_events
https://bug336359.bugzilla.mozilla.org/attachment.cgi?id=220609
http://ejohn.org/blog/offline-events/
postMessage ......

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var result=Math.round(original*100)/100;  //returns 28.45
2) // round "original" to 1 dec ......
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