FileUpload in form HTML

I have a Website and in one webpage there is a form, where one of the fields is to upload an image. I have created in my database a column picture of type LONGBINARY. I have read some webpages where they explain how to use <asp:FileUpload ID="FileUpload1" runat="server"/>. But the doubt is that I have an input tag <input id="Submit1" type="submit" value="Put In Store" /> for my form. All the webpages where they explain about FileUpload are using a ASP button, but for my form I need an submit input.

So:

• What do I do if it says I need a ASP Button but I need a submit input?
• Where need to be the code of the FileUpload when you click?

My last question about FileUpload(There are the links they gave me).