object literal - Javascript sub methods / namespacing with constructor functions -

i cannot thank enough time , help! i've searched 2 days , cannot find exact answer. begin:

i've used object literal notation create objects. however, i've come across situation need create multiple instances of same object. believe i'm attempting create "constructor functions":

i need have ability create multiple "window" objects:

var window1 = new window(); var window2 = new window(); var window3 = new window(); 

i want ability able organize methods such:

window1.errormessage.show(); window2.errormessage.hide(); window3.errormessage.hide(); 

instead of like:

window1.showerrormessage(); window2.hideerrormessage(); window3.hideerrormessage(); 

an example of how build window object in literal notation:

var window = {     id: null,      init : function(id) {         this.id = id;     },      errormessage : {         show : function(message) {             // jquery take id of window,             //  find errormessage html element within window,             //  insert "message" , show it.         },          hide : function() {             // jquery take id of window,             //  find errormessage html element within window , hide it.         }     } } 

an example of how attempt build window object using constructor functions , prototyping:

function window(id) {     this.id = id;      this.errormessage = function() {} }  window.prototype.errormessage = function() {}  window.errormessage.prototype.show = function(message) {     // jquery take id of window,     //  find errormessage html element within window,     //  insert "message" , show it. }  window.errormessage.prototype.hide = function() {     // jquery take id of window,     //  find errormessage html element within window , hide it. } 

when attempt execute following code:

var window1 = new window();  window1.errormessage.show('an error message'); 

(ultimately call using:)

this.errormessage.show('an error message'); 

i receive following console errors firefox:

• typeerror: window.errormessage undefined
• typeerror: window.errormessage.show not function

thank help. appreciate it.

i still declare methods on function's prototype attempted, you'll have declare show , hide methods on new errormessage type. think best , efficient (because instances of errormessage share same show , hide methods) thing (if understand needs correctly).

function window(id) {     this.id = id;     this.errormessage = new errormessage(); }  function errormessage() { } errormessage.prototype.show = function() {} errormessage.prototype.hide = function() {}