I want to adding style to asp.net label, but it wont work.

```
ASP.NET Mark up
<asp:Label runat="server" ID="lblCommentText"/>

Generated from the backend: Html mark up
<span id="ctl02_ctl36_CommentText">Only the leave the comment please</span>

............................................

```

I want to add the following style to the label

```
{
 float:right;
 width:70%;
}

```

I've tried using

1. cssClass property
2. Add this `lblCommentText.Attributes.CssStyle.Add("float", "right");` to backend
3. using javascript  

`document.getElementById('<%= lblCommentText.ClientID%>').Style.display = ("float","right");`
4. and also in-line style to the element

none of them works, can someone help me out ?