added sanity check for when the table has been altered

git-svn-id: svn://svn.open-ils.org/ILS/trunk@5661 dcc99617-32d9-48b4-a31d-7c20da2025e4

diff --git a/Open-ILS/web/opac/common/js/sorttable.js b/Open-ILS/web/opac/common/js/sorttable.js
index ca85bd2..710da47 100644 (file)
--- a/Open-ILS/web/opac/common/js/sorttable.js
+++ b/Open-ILS/web/opac/common/js/sorttable.js
@@ -70,6 +70,7 @@ function ts_resortTable(lnk) {
     // Work out a type for the column
     if (table.rows.length <= 1) return;
     var itm = ts_getInnerText(table.rows[1].cells[column]);
+        if(!itm) return;
     sortfn = ts_sort_caseinsensitive;
     if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/)) sortfn = ts_sort_date;
     if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/)) sortfn = ts_sort_date;