how to prevent page refresh in link button click event using asp.net C#

<div class="review-footer-new">

<p class="review-feedbackQuestion">
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    <asp:HiddenField ID="comment_like" runat="server" Value='<%#Eval("comment_id") %>' />

    <asp:HiddenField ID="comment_product_id" runat="server" Value='<%#Eval("id") %>' />

    <asp:LinkButton ID="cmt_like" runat="server" OnClick="cmt_like_Click">

        <span class="review-feedbackLink login-required" data-rating="1">
            <span class="review-feedback-isHelpful"></span>&nbsp;Yes
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    </asp:LinkButton>
    <asp:LinkButton ID="cmt_dislike" runat="server" OnClick="cmt_dislike_Click" onClientClick="return false">

        <span class="review-feedbackLink login-required" data-rating="0">
            <span class="review-feedback-isNotHelpful"></span>&nbsp;No
        </span>
    </asp:LinkButton>
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protected void cmt_like_Click(object sender, EventArgs e)
    {
        LinkButton btn = (LinkButton)sender;
        RepeaterItem item = (RepeaterItem)btn.NamingContainer;
        HiddenField comment_like = (HiddenField)item.FindControl("comment_like");

        if(Request.QueryString["id"]!=null)
        {
        int id;
        id = Convert.ToInt32(Request.QueryString["id"].ToString());
        con = new SqlConnection(str);
        con.Open();
        cmd = new SqlCommand("sp_command_like_dislike", con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@Action", "Y");
        cmd.Parameters.AddWithValue("@comment_id", comment_like.Value);
        cmd.Parameters.AddWithValue("@eid", id);
        cmd.ExecuteNonQuery();
        con.Close();
        }
        
    }

   
    protected void cmt_dislike_Click(object sender, EventArgs e)
    {

        LinkButton btn = (LinkButton)sender;
        RepeaterItem item = (RepeaterItem)btn.NamingContainer;
        HiddenField comment_like = (HiddenField)item.FindControl("comment_like");

        if (Request.QueryString["id"] != null)
        {
            int id;
            id = Convert.ToInt32(Request.QueryString["id"].ToString());
            con = new SqlConnection(str);
            con.Open();
            cmd = new SqlCommand("sp_command_like_dislike", con);
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddWithValue("@Action", "N");
            cmd.Parameters.AddWithValue("@comment_id", comment_like.Value);
            cmd.Parameters.AddWithValue("@eid", id);
            cmd.ExecuteNonQuery();
            con.Close();
        }
    }

<script type="text/javascript">
     jQuery(function ($) {
         $("a[disabled]").live("click", function () {
             e.preventDefault();
         });

         $(".review-feedbackLink").live("click", function () {
             if ($(this).closest("a").is("[disabled]")) { return false; }
             $(this).addClass("selected");
             $(this).parent().after("<span class='thanks'> Thanks for your vote! </span>");
             $(this)
                 .closest(".review-feedbackQuestion")
                 .find(".review-feedbackLink")
                 .closest("a")
                 .attr("disabled", "disabled");
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