function user_login()
{
	var params = Form.serialize($('login_form'));
	var ajax = new Ajax.Request('ajax/users/login.html', {
		method: 'post',
		parameters: params,
		//onLoading: function(){$('workingMsg').show()},
		//onLoaded: function(){$('workingMsg').hide()},
		onSuccess: function(transport){ 
			var response = transport.responseText || "no response text";// alert("Success! \n\n" + response); 
			//alert(response);
			$('user_menu').innerHTML = response; //alert($('user_menu').innerHTML);
		},
		onException: function(transport){ alert('Something went wrong...') } 		
	});
}