You wish to include the images on your document in your website.
Images cannot be copied and pasted into your website. They need to be individually uploaded to the server. Please convert them to JPG or GIF if they are not already, and then upload them as explained here.
Copying and pasting only works for text. For text, make sure to use the Paste From Word option that is on the editor toolbar.
Word can include some extra formatting that you do not want on your website pages, and using this option eliminates this.