Loading PowerPoint slides into HTML page automatically

How to load the slides created in Microsoft PowerPoint into HTML page in a server. The user will upload the power point presentation slides and I have to load them, do some processing if required and play a slideshow in the webpage itself. How to play slideshow in webpage in HTML? I have dream viewer tool for HTML design. How to load the slides into multiple windows, but in the same page, if the user prompts for multiple slides to play at once? Thank you for your help