Index: tables.uncompressed.js
===================================================================
--- tables.uncompressed.js	(revision 7018)
+++ tables.uncompressed.js	(working copy)
@@ -139,63 +139,65 @@
                 h = t.find('thead'),
                 bratz;
             
-            if (h.length === 0 && b.firstChild) {
-                // No THEAD, but TBODY has some rows
-                if (hrc !== undefined) {
-                    if (hrc > $(b).children().length) {
-                        hrc = $(b).children().length;
+            if (typeof(b) !== 'undefined' ) {
+                if ( h.length === 0 && b.firstChild) {
+                    // No THEAD, but TBODY has some rows
+                    if (hrc !== undefined) {
+                        if (hrc > $(b).children().length) {
+                            hrc = $(b).children().length;
+                        }
+                    } else {
+                        // See if we can find header rows by groping
+                        hrc = 0;
+                        var fc = b.firstChild;
+                        while (fc && fc.firstChild && fc.firstChild.tagName == 'TH') {
+                            hrc++;
+                            fc = fc.nextSibling;
+                        }
                     }
-                } else {
-                    // See if we can find header rows by groping
-                    hrc = 0;
-                    var fc = b.firstChild;
-                    while (fc && fc.firstChild && fc.firstChild.tagName == 'TH') {
-                        hrc++;
-                        fc = fc.nextSibling;
+                    if (hrc > 0) {
+                        bodies.before("<thead></thead>");
+                        h = t.find('thead');
+                        while (hrc--) {
+                            bratz = $(b).children();
+                            h.append($(bratz[0]).remove());
+                        }
                     }
                 }
-                if (hrc > 0) {
-                    bodies.before("<thead></thead>");
-                    h = t.find('thead');
-                    while (hrc--) {
-                        bratz = $(b).children();
-                        h.append($(bratz[0]).remove());
-                    }
+
+                var f = t.find('tfoot');
+                if (f.length !== 0 && f.children().length === 0) {
+                    // There's a bug in Render.pm that makes it generate
+                    // an empty tfoot even if there are footer rows
+                    // Remove empty tfoot and recompute
+                    f.remove();
+                    f = [];
                 }
-            }
-
-            var f = t.find('tfoot');
-            if (f.length !== 0 && f.children().length === 0) {
-                // There's a bug in Render.pm that makes it generate
-                // an empty tfoot even if there are footer rows
-                // Remove empty tfoot and recompute
-                f.remove();
-                f = [];
-            }
-            if (f.length === 0 && $(b).children().length > 0) {
-                // No TFOOT, are there enough rows in the body?
-                if (frc !== undefined) {
-                    if (frc > $(b).children().length) {
-                        frc = $(b).children().length;
+                if (f.length === 0 && $(b).children().length > 0) {
+                    // No TFOOT, are there enough rows in the body?
+                    if (frc !== undefined) {
+                        if (frc > $(b).children().length) {
+                            frc = $(b).children().length;
+                        }
+                    } else {
+                        // Footer rows not explicitly defined - see
+                        // if we can find footer rows by groping
+                        frc = 0;
+                        var lc = b.lastChild;
+                        while (lc && lc.firstChild && lc.firstChild.tagName == 'TH') {
+                            frc++;
+                            lc = lc.previousSibling;
+                        }
                     }
-                } else {
-                    // Footer rows not explicitly defined - see
-                    // if we can find footer rows by groping
-                    frc = 0;
-                    var lc = b.lastChild;
-                    while (lc && lc.firstChild && lc.firstChild.tagName == 'TH') {
-                        frc++;
-                        lc = lc.previousSibling;
+                    if (frc > 0) {
+                        bodies.after("<tfoot></tfoot>");
+                        f = t.find('tfoot');
+                        while (frc--) {
+                            bratz = $(b).children();
+                            f.append($(bratz[bratz.length - 1]).remove());
+                        }
                     }
                 }
-                if (frc > 0) {
-                    bodies.after("<tfoot></tfoot>");
-                    f = t.find('tfoot');
-                    while (frc--) {
-                        bratz = $(b).children();
-                        f.append($(bratz[bratz.length - 1]).remove());
-                    }
-                }
             }
         },