Ext.ux.ActionPagingToolbar = Ext.extend(Ext.PagingToolbar, {
    
    action: "",
    
    paramNames : {action: 'action', start: 'start', limit: 'limit'},
    
    initComponent : function(){
        Ext.ux.ActionPagingToolbar.superclass.initComponent.call(this);
        this.cursor = 0;        
    },
    
    doLoad : function(start){
        var o = {}, pn = this.paramNames;
        o[pn.action] = this.action;
        o[pn.start] = start;
        o[pn.limit] = this.pageSize;
        this.store.load({params:o});
    }
});

Ext.reg('actionpaging', Ext.ux.ActionPagingToolbar);