function swap_m(img_name,to_what,nochange) {
	if (nochange=='') {
		var swap, towhat;
		swap	= eval('document.images.'+img_name);
		towhat='/_img/'+to_what+'.gif';
		swap.src	= towhat;
	}
}

function affiche_div(val){
  var tmpa = document.getElementById(val);
  tmpa.style.display="";
}
function enlever_div(val){
  var tmpb = document.getElementById(val);
  tmpb.style.display="none";
}

function menueffect(val){
 var tmpc = document.getElementById(val);
 tmpc.style.backgroundImage  ='url(/_img/menu_fond3.gif)';
}