function set3DivHeight(idDiv1, idDiv2, idDiv3)
    {
        var maxHeight = 0;
        var div1 = document.getElementById(idDiv1).offsetHeight;
        var div2 = document.getElementById(idDiv2).offsetHeight;
        var div3 = document.getElementById(idDiv3).offsetHeight;
       
        maxHeight = (div1 < div2) ? div2 : div1;
        maxHeight = (maxHeight < div3) ? div3 : maxHeight;
       
        document.getElementById(idDiv1).style.height = maxHeight + "px";
        document.getElementById(idDiv2).style.height = maxHeight + "px";
        document.getElementById(idDiv3).style.height = maxHeight + "px";
    }