function showhide (bloc)
{
	
	var plop = document.getElementById(bloc);
	if(plop.style.display == "block"){
		plop.style.display = "none";
	}
	else {
		plop.style.display = "block";
		}
	var isIE6 = false /*@cc_on || @_jscript_version < 5.7 @*/;
	if(isIE6==true) {  plop.style.top = document.documentElement.scrollTop+30+"px"; }
}