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Show Tables

Source code for bookmarklet Show Tables.

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javascript:
(function(){
    
    function hasAttribute(e, a)
    {
        return e.hasAttribute(a);
    }

    var table_count = 0;
    function eD(dt) {
        var fs = dt.getElementsByTagName( "TABLE" );
        for (var i = 0, l = fs.length; i < l; ++i )
        {
            ++table_count;

            fs[i].style.border = "thin solid red;";
            if ( hasAttribute(fs[i], "SUMMARY") )
            {
                fs[i].style.borderTop = "thick solid green";
                fs[i].title = "Table summary: " + fs[i].summary;
            }
        }
    }


    function ifs_( fs )
    {
        for (var i = 0; i < fs.length; ++i)
        {
            try {
                dI_(fs[i].contentDocument, fs[i]); // recursive call
            }
            catch (e) {
                alert(e || "Unspecified error");
            }
        }
    }

    // "dI" == "documentIterator"
    function dI_(dt, f) {
        if (dt == null) {return;}
        eD(dt, f);
        ifs_( dt.getElementsByTagName("FRAME") );
        ifs_( dt.getElementsByTagName("IFRAME") );
    }

    // iterate through all documents
    dI_(document, null);

    var st = (table_count > 0) ? ("Tables: " + table_count) : "No tables";
    alert(st + ".");
})();

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