带计数器的遮罩控件

/**
* 计数器遮罩控件
* Ext-3.0.0
* 用法：和LoadMask用法完全一样
* <br>
* var mask = new Ext.TimerLoadMask(Ext.getBody(), {msg:"已经执行："});
    mask.show();
* @author DuanYong
* @since 2011-09-09
* @version 1.0
* @class Ext.TimerLoadMask
* @extends Ext.LoadMask
*/
Ext.TimerLoadMask = Ext.extend(Ext.LoadMask, {
onBeforeLoad : function(){
var i=0;
this.task = {
    run: function(){
        this.el.mask(this.msg+i++, this.msgCls);
    },
    scope: this,
    interval: 1000 //1 second
}
        if(!this.disabled){
        Ext.TaskMgr.start(this.task);
        }
    },
    onLoad : function(){
        this.el.unmask(this.removeMask);
        Ext.TaskMgr.stop(this.task);
    }
});
// 注册xtype
Ext.reg('timerLoadMask', Ext.TimerLoadMask);