ext onblur校验,该怎么解决

ext onblur校验
初学extjs，遇到个问题
登录页面，vtype为qtip，输入账号，失去焦点时，立即触发后台的action校验此账号是否存在，不存在时将返回的json中的msg属性的值，放到qtip的提示中。
注意：不是alert出msg，这个很容易。请教ext如何实现？

[解决办法]
不需要用vtype
写个onblur事件请求后台就可以了
[解决办法]

JScript code

Ext.ux.suggest = function(){    var msgCt;    function createBox(t, s){        return ['<div class="msg">',                '<div class="x-box-tl"><div class="x-box-tr"><div class="x-box-tc"></div></div></div>',                '<div class="x-box-ml"><div class="x-box-mr"><div class="x-box-mc"><font color=red><h2>', t, '</h2></font>', s, '</div></div></div>',                '<div class="x-box-bl"><div class="x-box-br"><div class="x-box-bc"></div></div></div>',                '</div>'].join('');    }    return {        show : function(title, format, pau){            if(!msgCt){                msgCt = Ext.DomHelper.insertFirst(document.body, {id:'msg-div'}, true);            }              if(!pau) pau = 3;            var s = String.format.apply(String, Array.prototype.slice.call(arguments, 1));            var m = Ext.DomHelper.append(msgCt, {html: createBox(title, s)}, true);            m.slideIn('t').pause(pau).ghost("t", {remove: true});        },        mask: function(id, title){            var el = Ext.get(id);            return {                show: function(s){                    el.mask(s || title, 'x-mask-loading');                },                 hide: function(){                    el.unmask();                },                destroy: function(){}            };        }    };}();/** * 重写、扩展Ext.MessageBox某些方法 * @author davi */Ext.apply(Ext.MessageBox, {        msgBox: function(ico, title, msg, fn, scope){            this.show({                title : title,                msg : '<br>' + msg,                buttons: this.OK,                fn: fn,                scope : scope,                icon: ico            });             return this;        },        //信息        info : function(msg, fn, scope){            return this.msgBox(this.INFO, '信息', msg, fn, scope);        },        //问题        quest : function(msg, fn, scope){            return this.msgBox(this.QUESTION, '问题', msg, fn, scope);        },        //警告        warn : function(msg, fn, scope){            return this.msgBox(this.WARNING, '警告', msg, fn, scope);        },        //错误        error : function(msg, fn, scope){            return this.msgBox(this.ERROR, '错误', msg, fn, scope);        },        //提示        cfm : function(msg, fn, scope){            var msg = '<br>' + msg;            return this.confirm('提示', msg, fn, scope);        },            mask: function(el, title){            return Ext.ux.suggest.mask(el, title);        },        //右上角提示        suggest: Ext.ux.suggest.show,        //自定义提示        throwOut: function(type,title,msg, format, pau){            if(type=='suggest') this.suggest(title,msg, format, pau)            else if (type=='alert') return this.alert(title,msg,format,pau);        }});var Msg = Ext.MessageBox;
[解决办法]
CSS code
new Ext.ToolTip({        target: 'passwordId',//显示在password的地方        html: 'Click the X to close me',        title: 'My Tip Title',        autoHide: false,        autoShow: true,        closable: true,        draggable:true    });