如何通过js在网页中获取和修改Silverlight中的对象。使用FindName方法。例子代码Silverlight中xaml：<UserControl x:Class=”html_set_sl.Page”    xmlns=”http://schemas.microsoft.com/winfx/2006/xaml/presentation”     xmlns:x=”http://schemas.microsoft.com/winfx/2006/xaml”     Width=”400″ Height=”300″>    <Grid x:Name=”LayoutRoot” Background=”White”>        <Rectangle x:Name=”r01″ Width=”300″ Height=”200″ Fill=”Aqua”></Rectangle>    </Grid></UserControl>在场景中定义了一个矩形（Rectangle），名字为r01以及相关属性。aspx页面中调用Silverlight：<asp:ScriptManager ID=”ScriptManager1″ runat=”server”></asp:ScriptManager>        <div  style=”height:100%;”>            <asp:Silverlight ID=”Xaml1″ runat=”server” Source=”~/ClientBin/html_set_sl.xap” MinimumVersion=”2.0.30523″ Width=”100%” Height=”100%” />        </div>Silverlight ID为Xaml1.javascript代码：<script type=”text/javascript”>     function setSilverlight() {        silverlight = document.getElementById(“Xaml1″);          //引用Silverlight插件到一个对象        var Rectangle0 = silverlight.content.FindName(“r01″);   //将Sl中的矩形r01引用到一个对象        Rectangle0["Height"]=”300″;                                         //设置举行的高为300        //alert(Rectangle0["Height"]);                                           //读取矩形的高     }</script>然后弄个button，加上事件就可以了。<input id=”Button1″ type=”button” value=”button” onclick=”setSilverlight()” />这样就能够在页面中通过js对Silverlight中的对象进行操作了。

判断是否安装了Silverlight插件。代码：<script type=”text/javascript”> function CheckSilverlightInstalled() { var isSilverlightInstalled = false; try{        try{               var slControl = new ActiveXObject(‘AgControl.AgControl’);//检查IE             isSilverlightInstalled = true;             }         catch(e){                         if(navigator.plugins["Silverlight Plug-In"]) //检查非IE                          {                                isSilverlightInstalled = true;                          }                       }        } catch(e){} return isSilverlightInstalled; } alert(CheckSilverlightInstalled()) </script>