Download the data onclick event

Wrap the IMG Tag in Anchor tag and set the URL of the File in HREF

 <a href= "http://mydomain.com/myfile.doc"><img src = "download.jpg" /></a>

But i want to open window on that click just like when we write somethim=ng in notepad and we click on save then that save as window will open

That window does not open in Web Apps it opens in windows apps. notepad is a windows app

But we can open that window as we can use for export to ppt or pdf. I want to use img tag and when i click on that i can able to save that data. I know that is windows application but can i able use do it using asp.net or javascript.

Did you try what I posted in my first reply? That does open File save dialog