function switchTheme(themeId,ctx,fond){
	//alert("switchTheme"+ctx);
	flashHeaderBridge.js2as_changeTheme(themeId);
	jQuery("#themeList .active").removeClass("active");
	jQuery("#theme_"+themeId).addClass("active");
	jQuery.ajax({
		url: ctx+"/anonymousMemberPlusTelechargesAjax.htm",
		data: {theme:themeId},
		dataType: "text",
		success: function(data, textStatus, XMLHttpRequest){
			jQuery('.lesplustelecharges').html(data);
		},
		error: function(XMLHttpRequest, textStatus, errorThrown){
			alert("erreur "+textStatus+" "+errorThrown);
		}
	});	
	if(fond==null){
		jQuery("#Content").removeClass("theme");
		jQuery("#Content").addClass("notheme");
		jQuery("#Content").css("background","none");
		jQuery("#Content .groupeHome h1").css("display","block");
	}
	else{
		jQuery("#Content").removeClass("notheme");
		jQuery("#Content").addClass("theme");
		jQuery("#Content").css("background","url("+ctx+"/img/fr/titre_theme/"+fond+") top center no-repeat");
		jQuery("#Content .groupeHome h1").css("display","none");
	}
	
}