birth of so many web frameworks. Their mission was to separate our business code from presentation layer (like JSP pages). Some of them (like Struts, Spring MVC, Velocity, etc…) have become widely adopted TextField("last")); add(new TextField("dob")); There are a couple of reasons: • Ambiguities that happen with duplicate ids • Inheriting state from parent to child We will examine these below. 14.1.1. Markup Id Ambiguities disableElement: function(elementId, activeIconUrl){ var hiderId = elementId + "-disable-layer"; var indicatorId = elementId + "-indicator-picture"; elementId = "#" + elementId;

birth of so many web frameworks. Their mission was to separate our business code from presentation layer (like JSP pages). Some of theme (like Struts, Spring MVC, Velocity, etc…) have become widely adopted TextField("last")); add(new TextField("dob")); There are a couple of reasons: • Ambiguities that happen with duplicate ids • Inheriting state from parent to child We will examine these below. 14.1.1. Markup Id Ambiguities disableElement: function(elementId, activeIconUrl){ var hiderId = elementId + "-disable-layer"; var indicatorId = elementId + "-indicator-picture"; elementId = "#" + elementId;

birth of so many web frameworks. Their mission was to separate our business code from presentation layer (like JSP pages). Some of them (like Struts, Spring MVC, Velocity, etc…) have become widely adopted TextField("last")); add(new TextField("dob")); There are a couple of reasons: • Ambiguities that happen with duplicate ids • Inheriting state from parent to child We will examine these below. 14.1.1. Markup Id Ambiguities disableElement: function(elementId, activeIconUrl){ var hiderId = elementId + "-disable-layer"; var indicatorId = elementId + "-indicator-picture"; elementId = "#" + elementId;

birth of so many web frameworks. Their mission was to separate our business code from presentation layer (like JSP pages). Some of them (like Struts, Spring MVC, Velocity, etc…) have become widely adopted TextField("last")); add(new TextField("dob")); There are a couple of reasons: • Ambiguities that happen with duplicate ids • Inheriting state from parent to child We will examine these below. 14.1.1. Markup Id Ambiguities disableElement: function(elementId, activeIconUrl){ var hiderId = elementId + "-disable-layer"; var indicatorId = elementId + "-indicator-picture"; elementId = "#" + elementId;