/*
    DefaultButton.js
    Version 1.1
    
    Perform Default Button Click when a button is clicked by user.
    Add onkeypress javascript event at the textbox. Onkeypress event must call this
    function. 
    
    For example:
    <input type="textbox" id="text1" onkeypress="clickButton(event, button1)" />
    
    where button1 is ID of button form widget:
    <input type="button" id="button1" />

    This script was copied from:    
    http://weblogs.asp.net/rajbk/archive/2003/12/11/setting-the-default-button-for-a-textbox-in-asp-net.aspx
*/

function clickButton(e, buttonid){
      var evt = e ? e : window.event;
      var bt = document.getElementById(buttonid);      
      if (bt){
          if (evt.keyCode == 13){
                bt.click();
                return false;
          }
      }
}