Thanks Paul,

I just copied this all out to a text file to look at. I got some of this working yesterday but was not able to get a client side script to run after the postback completed. I see some of the answers to this in your post.
Thank You
Tim

>>>Tim
>>
>>I'm working my way through this book right now and it seems to be pretty exhaustive in its coverage.
>>
>>http://www.amazon.com/JavaScript-Definitive-Guide-David-Flanagan/dp/0596101996/ref=sr_1_1?ie=UTF8&s=books&qid=1242828609&sr=1-1
>
>Yeah, I've got an older version of this book and it was OK. To be honest, I tend to just Google things now.
>
>To do what you're describing:
>
>

><script language="javascript" type="text/javascript"
>   function SetValue()
>   {
>      var myControl = document.getElementById('txtHidden');
>      if (myControl)
>         document.forms[0].submit();
>        // Instead of this you can use ASP.NET's __doPostback code to fire the postback. If you use it, it's then possible to intercept this info in the page
>        // __doPostBack('ControlOrEventCausingPostback', 'AnyParameters');
>        // In that case, you don't need the hidden input - pass the parameter as the second parameter of __doPostBack
>   }
></script
><input type="hidden" name="txtHidden" /
>
>// In your ASP.NET code-behind:
>if (Page.IsPostBack)
>{
>    string hiddenValue = Request.Form["txtHidden"];
>    // Do something
>    // Or if you are using ASP.NET's __doPostBack you can do this in Page_Load:
>    // string eventName = Request.Form["__EVENTTARGET"];
>    // string arg = Request.Form["__EVENTARGUMENT"];
>    // if (eventName == "ControlOrEventCausingPostback")
>    //    this.DoSomething(arg);
>}
>
>

>
>You can't easily persist variables between postback w/o just recreating them. What I normally do is just inject some JavaScript after the postback which calls the function you want, ex:
>
>

>string script = "<script type=\"text/javascript\">JSFunctionToRun();</script>";
>Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "JustNameOfScript", script);
>// You can actually call RegisterClientScriptBlock with a 4th parameter of true - that will add the <script tag stuff for you.
>

>
>This just tells ASP.NET to inject this JS code into the page. As soon as the browser loads it should run this code.