function enrol(caller,event) {
	var url="/ggl/async/event/enrol?eventId="+event;
	new Ajax.Request(url,{method:'post',onSuccess:function(transport) {
		if (transport.responseText=="false") {
			alert("some kind of error!");
			return;
			}
		caller.hide();	
		$("disenrolButton"+event).show();
		$("event"+event).style.marginLeft="5px";	
		new Effect.Highlight("event"+event);
		$("infoTextEnrolled"+event).show();	
	}});	
}		

function disenrol(caller,event,viewEnrolled) {
	var url="/ggl/async/event/disenrol?eventId="+event;
	new Ajax.Request(url,{method:'post',onSuccess:function(transport) {
		if (transport.responseText=="false") {
			alert("some kind of error!");
			return;
			}
		caller.hide();
		if(viewEnrolled) $("event"+event).hide();		
		$("enrolButton"+event).show();	
		$("event"+event).style.marginLeft="30px";	
		new Effect.Highlight("event"+event);
		$("infoTextEnrolled"+event).hide();	
	}});	
}