what is wrong

$("#login").click(function(){
	if( $("#username").val().length > 0 && $("#password").val().length > 0 ) {
         			$.ajax({
				url:"login.php",
				data:{username:$("#username").val(),password:$("#password").val()},
				type:"POST",
				success: function(data){
				if(data == "ok") window.location = "success.php";
				else $("#slfErrorAlert").html(data).show();
				}
				});
   			} else {
         		$("#slfErrorAlert").html(data).show();
    			}
});