Fix "Object doesn't support property or method 'toLowerCase'" on IE11.
Fix "Object doesn't support property or method 'toLowerCase'" on IE11.

AurelienLourot/myberl.in,AurelienLourot/myberl.in,AurelienLourot/myberl.in,AurelienLourot/mybeir.ut,AurelienLourot/mybeir.ut,AurelienLourot/mybeir.ut