title: jQuery How to control, does an element exist in document?
body: <p>I want to control does an element exist in document with its ID, when page is loading. I tried code which is below, but i failed.</p>
  
  <pre><code>   if($(':not(#&lt;%=TextBox1.ClientID %&gt;)')){
       alert("Object is null")else{alert("Object is exist")}}
  </code></pre>
  
  <p>Thansk for your helps already now.</p>