function toggledisplay(item,image)
    {
        var item =document.getElementById(item);
        if(item.style.display !="block")
        {
        item.style.display="block";
        image.src="images/ico/arrow_down.png";
        }
        else
        {
        item.style.display="none";
        image.src="images/ico/arrow_right.png";
        }
    }