if (sortkey == '' || sortby == '')
{
    document.getElementById("TimeSortImg").style.display = "";
    document.getElementById("TitleSortImg").style.display = "none";
    document.getElementById("TimeSortImg").src = "../../resource/images/arrow-down-red.gif";
}
else if (sortkey == 'Title')
{
    document.getElementById("TitleSortImg").style.display = "";
    document.getElementById("TimeSortImg").style.display = "none";
    
    if (sortby == 'ASC')
    {
        document.getElementById("TitleSortImg").src = "../../resource/images/arrow-up-red.gif";
        document.getElementById("TitleAnchor").href = "cooperNewsList.aspx?name=news&sortkey=Title&sortby=DESC";
    }
    else
    {
        document.getElementById("TitleSortImg").src = "../../resource/images/arrow-down-red.gif";
        document.getElementById("TitleAnchor").href = "cooperNewsList.aspx?name=news&sortkey=Title&sortby=ASC";
    }
}
else if (sortkey == 'Update_Time')
{
    document.getElementById("TitleSortImg").style.display = "none";
    document.getElementById("TimeSortImg").style.display = "";
    
    if (sortby == 'ASC')
    {
        document.getElementById("TimeSortImg").src = "../../resource/images/arrow-up-red.gif";
        document.getElementById("TimeAnchor").href = "cooperNewsList.aspx?name=news&sortkey=Update_Time&sortby=DESC";
    }
    else
    {
        document.getElementById("TimeSortImg").src = "../../resource/images/arrow-down-red.gif";
        document.getElementById("TimeAnchor").href = "cooperNewsList.aspx?name=news&sortkey=Update_Time&sortby=ASC";
    }
}