function displayDiv()
    {
      $("#a10").show(500);
      $("#a10").css({visibility:"visible",position:"relative"});        
    }

    var lastToggled
    
    function toggleImgCol(mydiv)
    {
        var IDimg =document.getElementById(mydiv);                 
        
        $("#"+mydiv + "_an").slideToggle(500);
        if(IDimg.style.backgroundImage == 'url("Images/plus.png")')
        {
            IDimg.style.backgroundImage = 'url(Images/minus.png)';
        }
        else if(IDimg.style.backgroundImage == 'url("Images/minus.png")')
        {
            IDimg.style.backgroundImage = 'url(Images/plus.png)';
        }       
    }