可以在 MyControl.ascx 写 javascript用 TypeNumberTextBox.ClientId 返回此对象在html 中的 id
然后用 page.registerscriptstattup("1","<script language=''></script>")
然后用 page.registerscriptstattup("1","<script language=''></script>")
string strClientScript = "<script language=javascript>var aa = document.forms[0]." + TypeNumberTextBox.ClientID + ".value<"
+ "/script>";
if(!Page.IsClientScriptBlockRegistered("MyControl_ClientScript"))
Page.RegisterClientScriptBlock("MyControl_ClientScript", strClientScript);