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<script type="text/javascript" language="javascript">
    function test()
    {
        alert("oec2003");
        return false;
    }
</script>
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protected void Button1_Click(object sender, EventArgs e)
{
    ClientScript.RegisterStartupScript(this.GetType(), "clear", "<script>test()</script>");
}
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public string GetAuthStatus()
       {
           ViewState["Auth"] = "Red";
           return ViewState["Auth"].ToString();
       }
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<script type="text/javascript" language="javascript">
    function getAuth()
    {
        var authStatus = "<%=GetAuthStatus()%>";
        return authStatus;
    }
</script>
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var strM = "javascript is a good script language";
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alert(arguments instanceof Array);//false
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