title: Wait until text is not present in textbox selenium
body: <p>Below is the scenario I am trying to automate:</p>
  
  <pre><code>1) Some text is already present in Textbox.
  2) Click on Radio button.
  3) Processing popup is displayed for few seconds. After popup disappears the textbox 
     becomes blank
  4) After textbox is blank then I have to enter different value in text box.
  </code></pre>
  
  <p>Please help me, how to wait till textbox value is blank.</p>
  
  <p>I am automating with IE driver.</p>
  
  <p>Thanks In advance</p>