var btnSubmit = "<%=btnSubmit.ClientID %>";var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_initializeRequest(onInitializeRequest);function onInitializeRequest(sender,args)
{ if(prm.get_isInAsyncPostBack()&&args.get_postBackElement().id == btnSubmit)
{
args.set_cancel(true); //给用户提示正在处理中 }
$get(btnSubmit).disabled = true;
}
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