Opening a window in aspx using javascript
<p>I am using the below code to open a new window while the function return the success message. At the same time i want to close the self window. Now am getting the error:</p>

<blockquote>
  <p>newwindow is not defined</p>
</blockquote>

<pre><code> var value = getQueryStrings();
 var cust_id = value["cust_id"];
 try {

     PageMethods.add_plan_items(unescape(items), cust_id, device, OnGetMessageSuccess, OnGetMessageFailure);

 } catch (ex) {
     alert(ex);
 }

 function OnGetMessageSuccess(result, userContext, methodName) {
     try {
         var ret_array = result.toString().split(':');
         if (ret_array[0] == "Success Alert ") {

             var left = (screen.width / 2) - 1015 / 2;
             var top = (screen.height / 2) - 550 / 2;

             self.close(); //Close the opened window

             //Enter here and self window is closed

             var newwindow = window.open('test.aspx?id=Y&amp;cust_id=' + cust_id, 'Add Items', 'height=550,width=1000,toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,left=' + left + ', top=' + top + ',screenX=' + left + ',screenY=' + top + '');
             if (window.focus) {
                 newwindow.focus()
             }
             return false;
         } else {
             self.close(); //Close the opened window
             alert('Error Alert : Error for adding plans in your specified device. Please try again later!');
         }

     } catch (ex) {
         alert(ex);
     }

 }

 function OnGetMessageFailure(error, userContext, methodName) {
     alert(error.get_message());
 }
</code></pre>
