Question: My requirement is to keep a chat window open across pages of my website, whatever the users do on the parent page, like refreshing or reloading the page or postbacks by controls. Please explain with code, how I can achieve this. Unless the user closes the chat window, it should remain open always, irrespective of navigation on parent page.

Answer: 
Give fixed position to the chat box div.

```css
.chatBox{
   position:fixed;
   z-index:9999;
   display:block;
   right:0;
   bottom:0; // chat box will place in bottom right corner of your window
   opacity:1;
   visibility:visible;
  }
```
You need to give your `div` a fixed position and placement using css. Also give a higher `z-index` to display it over everything.
In my example css, it'll place your `chat-box` div at the `bottom-right` corner.

Try this

```
.chat-box{
    position: fixed;
    bottom: 0; // Place Bottom
    right: 0; // Place right
    z-index: 10000; //Put Higher Value
}

```