如何利用js动态修改object的param的值,然后重新加载

<div style="width: 720px; height: 700px; float: left; z-index: -9999;">
            <object id="obj_today" name="CountXaml" data="data:application/x-silverlight-2,"
                type="application/x-silverlight-2" width="100%" height="100%">
                <param name="source" value="../ClientBin/Test.xap" />
                <param name="onError" value="onSilverlightError" />
                <param name="background" value="white" />
                <param name="minRuntimeVersion" value="4.0.60310.0" />
                <param name="autoUpgrade" value="true" />
                <param id="t1" name="InitParams" value="t1" />
                <param name="windowless" value="true" />
            </object>
        </div>

如何通过修改t1的值来加载不同的图表，求各位帮忙。。。 silverlight param 重新加载 异步 object --------------------编程问答-------------------- 没人啊。。。

补充：.NET技术 ,  图表区