ASP.NET button height is not working in IE7

[eihabisaac]

Hi,

i have a asp button that i want to set its height from C# Code:

<asp:Button ID="DCs_Green" runat="server" >
</asp:Button>

the CSS is as following:

#DCs_Green
{
    width:70px;
    background:green;
    float:left;
    border:0px;
    padding:0px;
    margin:0px;
}

then i set the height based on a some calculations from C# code behind as following:

DCs_Green.Style.Add("height", percentageOf.ToString() +"%" );

Every thing works fine when i open the page from IE8, but when i open the page in compatability view the height property doesn't take effect and doesn't work as it should. I'm assuming that it won't work with IE7 or IE6 as well.

what is the right CSS that i should use to get that working with IE7 and compatability view?

Thanks in advance
Eihab Isaac