检测客户端是否安装 Silverlight 插件

function CheckSLInstalled() {
    var isSLInstalled = false;
    try {
        try {
            var slControl = new ActiveXObject('AgControl.AgControl'); //检查IE
            isSLInstalled = true;
        }
        catch (e) {
            if (navigator.plugins["Silverlight Plug-In"]) //检查非IE
            {
                isSLInstalled = true;
            }
        }
    }
    catch (e) { }
    return isSLInstalled;
}

 

 

调用的地方(安装过之后返回 true，没安装过返回 false )：

    <script type="text/javascript" language="javascript">
        alert("是否安装了 Silverlight 插件？" + CheckSLInstalled())
    </script>