Ext2表格中文排序

Ext.data.Store.prototype.applySort = function(){
        if(this.sortInfo && !this.remoteSort){
                var s = this.sortInfo, f = s.field;
                var st = this.fields.get(f).sortType;
                var fn = function(r1,r2){
                        var v1 = st(r1.data[f], v2 = st(r2.data[f]);
                        if (typeof(v1) == "string"){
                                return v1.localeCompare(v2);
                        }
                        return v1>v2?1:(v1<v2?-1:0);
                };
                this.data.sort(s.direction,fn);
                if(this.snapshot && this.snapshot != this.data){
                        this.snapshot.sort(s.direction,fn);
                }
        }
};