Hi
I achieved through javascript
<script type="text/javascript">
function ddlChange(ddl) {
if (ddl.selectedIndex == 0) {
ddl.style.backgroundColor = 'Yellow';
ddl.options[0].innerText = 'Please select...';
} else {
ddl.style.backgroundColor = '';
ddl.options[0].innerText = '';
}
}
</script>
<asp:DropDownList ID="DropDownList4" runat="server" Height="19px" Width="154px" onchange="ddlChange(this)">
<asp:ListItem Value="">... select...</asp:ListItem>
<asp:ListItem>Beginner</asp:ListItem>
<asp:ListItem>Proficient</asp:ListItem>
<asp:ListItem>Expert</asp:ListItem>
</asp:DropDownList>
Thank you