function affiche(e)
{var outils=document.getElementById("outils");if(document.getElementById("span_icone").firstChild!=null)
{document.getElementById("span_icone").firstChild.nodeValue=e.alt;}
else
{document.getElementById("span_icone").appendChild(document.createTextNode(e.alt));}}
function efface(e)
{document.getElementById("span_icone").firstChild.nodeValue="";}