string script = “<script>”;
script = script + “js code;”;
script = script + “js code;”;
script = script + “</script> “;
ScriptManager.RegisterStartupScript(UpdatePanel4, this.GetType(), “script”, script, false);

UpdatePanel4：对象id
this.GetType()：脚本块的类型
“script”：标识符
script：脚本内容
false：不添加<script></script>