function validation(varuser, varevent) {
	
	var valide = $.ajax({ 
		type: "GET", 
		url: "./includes/ajax.php", 
		data: {a: 'validation', user_id: varuser, event_id: varevent}, 
		dataType: "text", 
		async: false
	}).responseText;
	
	//valide now contains the new value (1 for a validation, 0 for a cancelation)
	var img = $("tr#"+varuser+" td.statut span");
	if (valide == 1) {
		img.fadeOut("fast", function() {
			img.removeClass("cancel"); 	//Remove class "cancel"
			img.addClass("check");		//Add class "check"
			img.fadeIn("fast");
			img.attr("title", "valide");
		});
	}
	else {
		img.fadeOut("fast", function() {
			img.removeClass("check");	//Remove class "check"
			img.addClass("cancel");		//Add class "cancel"
			img.fadeIn("fast");
			img.attr("title", "non valide");
		});
	}
}

function changelevel(varuser, varevent) {
	
	var level = $.ajax({ 
		type: "GET", 
		url: "./includes/ajax.php", 
		data: {a: 'changelevel', user_id: varuser}, 
		dataType: "text", 
		async: false
	}).responseText;
	
	//level contains the new value (1 for user, 5 for admin)
	var img = $("tr#"+varuser+" td.level span");
	if (level == 1) {
		img.fadeOut("fast", function() {
			img.removeClass("star"); 	//Remove class "star"
			img.addClass("user");		//Add class "user"
			img.fadeIn("fast");
			img.attr("title", "user");
		});
	}
	else {
		img.fadeOut("fast", function() {
			img.removeClass("user");	//Remove class "user"
			img.addClass("star");		//Add class "star"
			img.fadeIn("fast");
			img.attr("title", "admin");
		});
	}
}