function hide_menu(nom){
	var calque_nom = document.getElementById('cat'+nom);
	calque_nom.style.display='block';
	document.getElementById('img'+nom).src='images/menu_'+nom+'_hv.png';
}
function show_menu(nom){
	var calque_nom = document.getElementById('cat'+nom);
	document.getElementById('img'+nom).src='images/menu_'+nom+'.png';
	calque_nom.style.display='none';
}
function calculer(){
	var total = 0;
	var art1 = document.getElementById('art1').value;
	var art2 = document.getElementById('art2').value;
	var art3 = document.getElementById('art3').value;
	total = (art1*12)+(art2*15)+(art3*15);
	document.getElementById('t').innerHTML = "<H4>"+total+" &euro;</H4>";

}
function verif_boutique(){
	if(document.getElementsByName('nom').value==""){
		alert("Vous avez oubli&eacute; d'indiquer votre nom.");
		return false;
	}else{return true;}
}
function open_img(url_img){
	var fond_ap=document.getElementById('fond_ap');
	var img_ap=document.getElementById('img_ap');
	if(img_ap.style.display=="none"){
		fond_ap.style.display="block";
		img_ap.innerHTML ="<table width=\"700\" height=\"500\"><tr><td width=\"100\">&nbsp;</td><td align=\"center\" valign=\"middle\"><img src=\"" + url_img + "\" onclick=\"javascript:close_img();\"></td><td width=\"100\" valign=\"top\" align=\"center\" style=\"padding-top:10px;\"><a href=\"\" onclick=\"close_img();return false;\">Fermer</a></td></tr></table>";
		img_ap.style.display="block";
	}
}
function close_img(){
	var fond_ap=document.getElementById('fond_ap');
	var img_ap=document.getElementById('img_ap');
	img_ap.style.display="none";
	img_ap.innerHTML="";
	fond_ap.style.display="none";
}