Get attribute values in Code page [ aspx.cs ]

 <script type="text/javascript">
       function XYZ() {
                             var testValue = document.getElementById("<%= mddlenvironment.ClientID %>");
                             testValue.title = "12345";
                            }
</script>
protected void Page_Load(object sender, EventArgs e)
{
         string s =  mddlenvironment...... // How can i get that Tiltle Value Here
}
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