Ext.Net - 更改面板宽度 Javascript

Ext.Net - Change panel width from Javascript

我想更改 javascript 的面板宽度大小。 这是我的代码,但不起作用:

Javascript代码:

<script type="text/javascript">
    var ExtraExpandMAP = function (pannello) {
        pannello.setWidth = 920;
    };
</script>

Asp.Net代码:

<ext:Panel ID="PanelLazyMAP" runat="server" 
    Region="East" 
    Width="460"                 
    Title="Mappa"
    Layout="Fit" 
    Floatable="false"
    Resizable="true"
    Collapsed="true"                    
    Collapsible="true"
    AutoScroll="false"
    BodyStyle="background-color:#ffffff;"
    MarginSpec="84 0 0 0" AnimCollapse ="false">
    <HeaderConfig>
        <Items>
            <ext:Button ID="btnExpandExtraMAP" runat="server" Icon="RewindGreen">
                <Listeners>
                    <Click Handler="ExtraExpandMAP(#{PanelLazyMAP});">              
                    </Click>
                </Listeners>
            </ext:Button>
        </Items>
    </HeaderConfig>
</ext:Panel>

问题是:

pannello.setWidth = 920;

而不是:

pannello.setWidth(920);