function displayingButton(flag)
{
    var br1 = document.getElementById("ctl00_BodyPlaceHolder_b_renew1");
    var bd1 = document.getElementById("ctl00_BodyPlaceHolder_b_delete1");
    var br2 = document.getElementById("ctl00_BodyPlaceHolder_b_renew2");
    var bd2 = document.getElementById("ctl00_BodyPlaceHolder_b_delete2");
    var hf = document.getElementById("ctl00_BodyPlaceHolder_hf_ads");
    if (flag == false)
    {
        br1.style.display = 'none';
        bd1.style.display = 'none';
        br2.style.display = 'none';
        bd2.style.display = 'none';
    }
    else
    {
        br1.style.display = 'inline';
        bd1.style.display = 'inline';
        br1.style.margin = '0px 0px 0px 635px';
        bd1.style.margin = '0px 0px 0px 635px';
        br2.style.display = 'inline';
        bd2.style.display = 'inline';
        br2.style.margin = '0px 0px 0px 635px';
        bd2.style.margin = '0px 0px 0px 635px';
    }
}
function setHiddenValue(rs_id)
{
    var cb = document.getElementById("cb" + rs_id);
    var hf = document.getElementById("ctl00_BodyPlaceHolder_hf_ads");
    if (cb.checked == true)
    { 
        if (hf.value.search(rs_id) == -1)
        {
            if (hf.value != "")
                hf.value += ";"
            hf.value += rs_id ;
        }
    }
    else
    {
        if (hf.value.search(";") != -1)
            hf.value = hf.value.replace(";" + rs_id, "");
        else
            hf.value = hf.value.replace(rs_id, "");
    }
    if (hf.value == "")
        displayingButton(false);
    else
        displayingButton(true); 
}
function setAllChecked()
{
    var sacb = document.getElementById("select_all_cb");
    var CBs = document.getElementsByTagName("input");
    var hf = document.getElementById("ctl00_BodyPlaceHolder_hf_ads");
    
    hf.value = "";
    if (sacb.checked == false)
    {
        for (var i = 0; i < CBs.length; i++) 
        {
            if (CBs[i].type.toLowerCase() == "checkbox" ) 
            {
                if (CBs[i].id.search("select_all_cb") == -1)
                {
                    CBs[i].checked = false;
                }
            }
        }
    }
    else
    {
        for (var i = 0; i < CBs.length; i++) 
        {
            if (CBs[i].type.toLowerCase() == "checkbox" ) 
            {
                if (CBs[i].id.search("select_all_cb") == -1)
                {
                    CBs[i].checked = true;
                    if (hf.value != "")
                        hf.value += ";";
                    hf.value += CBs[i].value ;
                }
            }
        }
    }
    if (hf.value == "")
        displayingButton(false);
    else
        displayingButton(true); 
}