jQuery selector worked in 2007 but not in 2010
<p>$("#aspnetForm").attr('action', newAction);
In SP2007 it worked fine, in SP2010 I get the following error in the SharePoint log:</p>

<p>System.Web.HttpException: Failed to load viewstate.
Can someone help me with this problem?</p>

<pre><code>&lt;script type="text/javascript" src="/_layouts/jquery/jquery-1.3.2.min.js"&gt;&lt;/script&gt;
&lt;script type="text/javascript"&gt;
fields = init_fields();
// Where to go when cancel is clicked
goToWhenCanceled = '/test/English/YouCanceled.aspx';

// Edit the redirect on the cancel-button's
$('.ms-ButtonHeightWidth[id$="GoBack"]').each(function(){
    $(this).click(function(){
            STSNavigate(goToWhenCanceled);
      })
});

// Edit the form-action attribute to add the source=yourCustomRedirectPage
function setOnSubmitRedir(redirURL){
var action = $("#aspnetForm").attr('action');
var end = action.indexOf('&amp;');
    if(action.indexOf('&amp;')&lt;0){
        newAction = action + "?Source=" + redirURL;
    }else{
        newAction = action.substring(0,end) + "&amp;Source=" + redirURL;
    }
$("#aspnetForm").attr('action',newAction);
alert(redirURL);
}

/*
// Use this for adding a "static" redirect when the user submits the form
$(document).ready(function(){
    var goToWhenSubmitted = '/test/English/ThankYou.aspx';
    setOnSubmitRedir(goToWhenSubmitted);
});
*/

// Use this function to add a dynamic URL for the OnSubmit-redirect. This function is automatically executed before save item.
function PreSaveAction(){
// Pass a dynamic redirect URL to the function by setting it here,
// for example based on certain selections made in the form fields like this:

    var dynamicRedirect = '/surveys/Pages/ThankYou.aspx';

    // Call the function and set the redirect URL in the form-action attribute
    setOnSubmitRedir(dynamicRedirect);
    alert(dynamicRedirect);
    // This function must return true for the save item to happen
    return true;
}

function init_fields(){
  var res = {};
  $("td.ms-formbody").each(function(){
      if($(this).html().indexOf('FieldInternalName="')&lt;0) return;
      var start = $(this).html().indexOf('FieldInternalName="')+19;
      var stopp = $(this).html().indexOf('FieldType="')-7;
      var nm = $(this).html().substring(start,stopp);
      res[nm] = this.parentNode;
  });
  return res;
}
&lt;/script&gt;
</code></pre>
