Dynamically insert widget with info code.

widget-info.html

<div id="ideamarketplace"></div>
<script>
(function(appendTo, info) {
    var el = document.createElement("iframe");
    el.src = 'http://widget.allourideas.org/testmarketplace?info='+info+'&submit_button=FCC044&vote_button=FCC044&flag_text=000000&tab_hover=000000&cant_decide_button=FCC044&add_idea_button=FF7600&question_text=000000&text_on_color=000000';
    el.width = '815';
    el.height = '400';
    el.frameborder = '0';
    el.scrolling = 'no';
    document.getElementById(appendTo).appendChild(el);
})('ideamarketplace', 'info_id');
</script>

Is this for google gadgets?

No, this is not for Google Gadgets. Here's more information about the allourideas widget: http://blog.allourideas.org/post/912665189/improved-widget-gives-you-more-control