title: How to blur content after ajax call
body: <p>I'm using ajax call on my page which changes content of a division block.
  What I wanted is to make that div content blur until new content loaded.</p>
  <p>So,</p>
  <p>Step 1 : click on button.</p>
  <p>Step 2 : blur the content of that division block and user can't select anything now from that division.</p>
  <p>Step 3 : Content loaded and gets back to normal state.</p>
  <p>Step 1 and 3 are already done. What I need is step 2.</p>