var pagewidth=window.screen.width;//获得页面宽度
var pageheight=window.screen.height;//获得页面高度

/*Transevent = function(){
	this.addEvents("reload_grid");
};
var transev = new Transevent();
Ext.extend(Transevent,Ext.util.Observable);*/
//为改写baseParams重写源码，解决了过去传参数不成功现象
Ext.override(Ext.data.Store, {  
    storeOptions : function(o) {  
        o = Ext.apply({}, o);  
        if (o.params)  
            o.params = Ext.apply({}, o.params);  
        delete o.callback;  
        delete o.scope;  
        this.lastOptions = o;  
    }  
});