google.load("books", "0");
  var valor;                   
function alertBook()
    {
       
     location.href = location.href + "?ChamarFuncao=1"

    }

function initialize()
    {


     var viewer = new google.books.DefaultViewer(document.getElementById('viewerCanvas'));

     viewer.load(document.form1.txtIsbn.value,Nobook,alertBook);
       
        valor = document.form1.txtIsbn.value;                     
                            
    }
   function Nobook()
   {
   location.href = location.href + "?ChamarFuncao=2"
   
   }

google.setOnLoadCallback(initialize);

    function imgBtn_ok_onclick()
    {
    var isbn =  "/wpgGooglePreview.aspx?ISBN=" + valor;
    window.showModalDialog(isbn,'','dialogWidth:600px;dialogHeight:505px');
    }