Setting the default Button for a TextBox in ASP.NET

We perform a browser detection because IE and Netscape have different event models. The function finally returns false so that the keypress event is cancelled (otherwise a second form submit will be raised). This works with newer versions of IE/Netscape.

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; 
          } 
      } 
}

//code behind 
TextBox1.Attributes.Add("onkeypress", "return clickButton(event,'" + Button1.ClientID + "')");

The code behind generates the following code:

<input name="TextBox1" type="text" id="TextBox1" onkeypress="return clickButton(event,'Button1')"  />

This causes web control Button1 to be clicked when the enter key is hit inside TextBox1.

 

There are better ways to do this with the newest version of ASP.net!