How to highlight the selected row of a gridview

Thanks, I tried your solution in this way but not working

protected void GridviewSample_RowDataBound(object sender, GridViewRowEventArgs e)
{

if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Attributes["onmouseover"] =
"javascript:setMouseOverColor(this);";
e.Row.Attributes["onmouseout"] =
"javascript:setMouseOutColor(this);";
e.Row.Attributes["onclick"] =
ClientScript.GetPostBackClientHyperlink
(this.GridviewSample, "Select$" + e.Row.RowIndex);
}
and design code.

<script type="text/javascript">
var oldgridSelectedColor;

function setMouseOverColor(element) {
oldgridSelectedColor = element.style.backgroundColor;
element.style.backgroundColor = 'yellow';
element.style.cursor = 'hand';
element.style.textDecoration = 'underline';
}

function setMouseOutColor(element) {
element.style.backgroundColor = oldgridSelectedColor;
element.style.textDecoration = 'none';
}
</script>


<asp:GridView ID="GridviewSample" runat="server" AutoGenerateColumns="false"
onselectedindexchanged="GridviewSample_SelectedIndexChanged"
onselectedindexchanging="GridviewSample_SelectedIndexChanging"
ondatabound="GridviewSample_DataBound" >

<columns> <asp:BoundField DataField="SNo" HeaderText="SNo" />

<asp:TemplateField HeaderText="Name">
<itemtemplate>
<asp:TextBox ID="txtname" runat="server" >




<asp:Button ID="BtnSave" runat="server" onclick="BtnSave_Click" Text="Save" />
<asp:TextBox ID="TextBox1" runat="server">

Is it right, please advice