javascript error in module_filter.js in IE8

There is a javascript error on line 98 in module_filter.js when using IE8, while everything is doing fine with firefox, chrome and safari.

After digging in code, I saw that for some reason the loop in queryStrings was going through extra key values under IE8 (input, index and lastIndex) causing a non supported property error. As a fix I added a filter to not process those keys if encountered. So I suggest the following change :

for (var i in queryStrings) {
  ++ if ( i != 'input' && i != 'index' && i != 'lastIndex') { 
        var query = { operator: 'text', string: queryStrings[i] };
          if ( self.operators != undefined) {
            // Check if an operator is possibly used.
            if (queryStrings[i].indexOf(':') > 0) {
              // Determine operator used.
              var args = queryStrings[i].split(':', 2);
              var operator = args.shift();
              if (self.operators[operator] != undefined) {
                query.operator = operator;
              query.string = args.shift();
            }
          }
        }
        query.string = query.string.toLowerCase();
        self.queries.push(query);
  ++}
}

I hope this will help to have this IE8 issue fixed in a next release.