A lot of times in development scenarios you come to a situation where you want to do a postback on a webpage when a user hits the enter button.

If you are using RadAjaxManager on that page, then to submit the page for postback or invoke a button click event handler, use the following code:

   1: function PerformPostBack(e)
   2: {
   3:     evt = e || window.event;
   4:     var Key = evt.which || evt.keyCode;
   5:     if ( Key == 13 ) 
   6:     {
   7:         AjaxNS.ARWO(new WebForm_PostBackOptions("<%=btnButton.UniqueID%>", "", true, "", "", false, true), "<%=UpdateControl.ClientID%>", event);
   8:         return false;
   9:     }
  10: }

In the web page where the textbox is set onKeyPress=”return PerformPostBack(event)”