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Just inserted a Google+ photo album on a web page built with Google Sites, then realized that it requires Flash! This means it doesn't display on my tablet, for example.
Without requiring Flash, Is there a simple way to make a photo album available on Google Sites, and auto-play as a slideshow?
You cannot add JavaScript directly to your Google Sites page. You can, however add a Google Gadget that has JavaScript in it. You can try the Google Gadget Builder. You may not get the result that you want, however, since your JavaScript is not valid. For example, your statements with (x)html elements will cause the JS engine to error.
var <strong class="highlight">images</strong> = new Array( "image1.jpg",
"image2.jpg",
"image3.jpg");
It may work with E4X, but Google Sites is not rendered as XML. (Yes, it does have the XML doctype, but not the header, so it will not render as XML)
In addition to Google Gadgets, you can also try Google Apps Scripts. It allows for some server side automation.
You can do this by:
Photos sections
Your albums
Edit link
Edit link and a popup will appear where you check/amend the visibility.
Best Answer
The Picasa Album embed is very old and not development is happening on the Picasa side anymore. Eventually Google Photos might roll out a album embed but they have announced no such plans.
In the meantime I would recommend looking at the community built Picasa album web component. You can see an example of your album which you would obviously want to host the files on your own URL/site.
Another option would be to use a Google+ embedded post. Example