XPage 和链式局部刷新

XPages and chained partial refresh

我想在第一次部分刷新完成后在第二个面板上执行部分刷新。这是我的源代码:

<xp:comboBox id="comboBox3" value="#{document1.Company}">
<xp:selectItem itemLabel="Select a Company" itemValue="Select a Company">
</xp:selectItem>
<xp:selectItems>
<xp:this.value><![CDATA[#{javascript:var db = sessionScope.serverPath + "!!" + sessionScope.dbName; @Trim(@Unique(@DbColumn(db, "vwTblCompany",1)));}]]></xp:this.value>
</xp:selectItems>
<xp:eventHandler event="onclick" submit="true"
                        refreshMode="partial" refreshId="pnlLocation">
</xp:eventHandler>
<xp:eventHandler event="onchange" submit="true" refreshMode="partial" disableValidators="true" refreshId="pnlLocation">
<xp:this.action><![CDATA[#{javascript:getComponent("comboBox4").setValue("Select a Location");}]]></xp:this.action>
</xp:eventHandler>
<xp:eventHandler>
<xp:this.onComplete><![CDATA[function() {
XSP.partialRefreshGet("#{id:pnlApprovalInfo}");
}]]></xp:this.onComplete>
</xp:eventHandler>
</xp:comboBox>

点击关键字字段时出现的错误是:

更新部分页面时出错。无法读取 null 的 属性 'call'。

有人可以告诉我我做错了什么吗?

谢谢,

没关系。我知道怎么做了:

<xp:comboBox id="comboBox3" value="#{document1.Company}">
<xp:selectItem itemLabel="Select a Company" itemValue="Select a Company">
</xp:selectItem>
<xp:selectItems>
<xp:this.value><![CDATA[#{javascript:var db = sessionScope.serverPath + "!!" + sessionScope.dbName; @Trim(@Unique(@DbColumn(db, "vwTblCompany",1)));}]]>  
</xp:this.value>
</xp:selectItems>
<xp:eventHandler event="onclick" submit="true"
                    refreshMode="partial" refreshId="pnlLocation">
<xp:this.onComplete><![CDATA[XSP.partialRefreshGet("#{id:pnlApprovalInfo}")]]></xp:this.onComplete>
</xp:eventHandler>