function select_image(select)
{
	select.style.backgroundImage = select.options[select.selectedIndex].style.backgroundImage;
}

function unselect(selectid)
{
	select = document.getElementById(selectid);
	select.selectedIndex = -1;
	select.style.backgroundImage = 'none';
}
function show(element){
        if(document.getElementById(element).style.visibility = 'hidden') {
                document.getElementById(element).style.visibility = 'visible';
			
        }
}
function hide(element){
        if(document.getElementById(element).style.visibility = 'visible') {
                document.getElementById(element).style.visibility = 'hidden';
				
        }
}