function bImg(ctrl){
    //alert(ctrl);
    var IBtn = document.getElementById("_ctl0_p_btn" + ctrl);
    IBtn.src = "images/" + ctrl + "HL.gif";
}

function aImg(ctrl){
    var IBtn = document.getElementById("_ctl0_p_btn" + ctrl);
    IBtn.src = "images/" + ctrl + ".gif";
}