in subsilver, files overall_header.html and simple_header.html, the following javascript piece appear:

    window.onload = function()    {        for (i = 0; i <= onload_functions.length; i++)        {            eval(onload_functions[i]);        }    }    window.onunload = function()    {        for (i = 0; i <= onunload_functions.length; i++)        {            eval(onunload_functions[i]);        }    } 

first and foremost, the loops should run to
i < onunload_functions.length
and not
i <= onunload_functions.length
in addition, it is polite, in javascript, to define variables, so it should be
for (var i = 0; i < onunload_functions.length; i++)