$(document).ready(function() {
	var checkUser = function (usernick) {
		//remove all the class add the messagebox classes and start fading
		$("#msgbox").removeClass().addClass('messagebox').text('Checking...').fadeIn("slow");
		var usernick = $('#usernick').val();
		$.post(
			"index.php?headlines-guestnicktest",
			{check: 'usernick', user: usernick},
			function(data) {
				if(data=='no') { //if usernick not avaiable
				  	$("#msgbox").fadeTo(200,0.1,function() { //start fading the messagebox
						//add message and change the class of the box and start fading
			  			$(this).html('usernick bereits vergeben!').removeClass('messagebox').addClass('messageboxerror').fadeTo(900,1);
					});		
          		}
		  		else {
		  			$("#msgbox").fadeTo(200,0.1,function() {  //start fading the messagebox
			  			//add message and change the class of the box and start fading
			 		 	$(this).html('usernick noch frei!').removeClass('messagebox').addClass('messageboxok').fadeTo(900,1);	
					});
		  		}
			}			
		)
	}
	$("#usernick").blur(checkUser);
});