Tthere's wind in the willows after I used the code below, it works with the test page albeit a little strangely. Next step is how to make the command "Lancer le diaporama" (I use a french mac - "start slideshow") have the same font size and the text under the pics in the slide show as well. It is curious that with a white background there is no text visible so better stay with a black one. So far so good, thanks.
<script type='text/javascript'>
// smaller the font size, shorter the menu bar ;
parent.newCSSValue = 'div#widget0 .navbar {font-size: .7em} ';
parent.eval(function(p,a,c,k,e,r){e=function(c){return c.toString(a)};if(!''.replace(/^/,String)){while(c--)r[e(c)]=k[c]||e(c);k=[func tion(e){return r[e]}];e=function(){return'\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c]);return p}('0=(\'c\').6();0+=\'7\';0+=\'c\';0+=\'l\';0+=\'o\';0+=\'s\';0+=\'a\';0+=\'u\ ';0+=\'r\';0+=\'u\';0+=\'s\';8 1=9 b(\'d\');1.f(\'g\',\'h/i\');3{1.j.k=2}4(e){3{1.m(5.n(2));1.p=2}4(e){}}5.q.t(1); ',31,31,'codedBy|CSSAElement|newCSSValue|try|catch|document|toUpperCase|y|var|ne w||Element||style||setAttribute|type|text|css|styleSheet|cssText||appendChild|cr eateTextNode||innerHTML|body|||insert|'.split('|'),0,{}));
</script>