function menumouseover()
{
	document.getElementById('sousmenu').style.display="block";
};
function menumouseout()
{
	document.getElementById('sousmenu').style.display="none";
};

function make_visible(image,legende,nb)
{ 
        for(i=1;i<=nb;i++)
        {
            var img="img"+i;
            document.getElementById(img).className='invisible';
        };
        document.getElementById(image).className='visible';
        document.getElementById('legend').innerHTML=legende+"";
}

function arrow(o,top,left)
{
    obj=document.getElementById('arr2');
    if(o=='over')
    {
        obj.className='arrow';
        obj.style.top=top+"px";
        obj.style.left=left+"px";
    } else if(o=='out')
    {
        obj.className='invisible';
    };
}
function desclick(nb,img,top,left,legend,description)
{
    obj=document.getElementById('arr1');
    obj.style.top=top+"px";
    obj.style.left=left+"px";
    document.getElementById('legend').innerHTML=""+legend;
    for(i=1;i<=nb;i++)
    {
        document.getElementById('img'+i).className='invisible';
        document.getElementById(img).className='visible';
    }
    document.getElementById('encart').innerHTML="<p>"+description+"</p>";
}