Ext.PagingToolbar.prototype.doLoad = function(start) {
var o = {}, pn = this.paramNames;
o[pn.start] = start;
o[pn.limit] = this.pageSize;
if (this.fireEvent('beforechange', this, o) !== false) {
o = Ext.apply(this.store.lastOptions.params, o);
this.store.load({
params : o
});
}
};