jQuery Plugin variable availability -

today first time, ran problem variables being mixed multiple instances of jquery plug-ins.

a simple version of plug-in can viewed here: http://jsfiddle.net/jydzb/2/

i want able create timer in plugin, , access variable "mytimer" in method within plugin. in case, destroy it. however, thought sure creating variables did below "mytimer" made variable available in class/plugin? wrong? how use variables within plugin? know store them in $obj.data('',''), doesn't make sense when store in var.

you see when run jsfiddle script, doesn't destroy timer.

simple html

write line every 5 seconds... destroy after 10:<br /> <hr /> <div id='mydiv' style='border: solid 1px #000;float:left;'></div> <div id='mydiv2' style='border: solid 1px #f00;float:right;'></div> 

jquery plugin

if (jquery) (     function (jquery) {                 var mytimer;                     var methods = {             init: function () {                 return this.each(function () {                     var $obj = $(this);                     var data = $obj.data('init');                     if (!data) {                         mytimer = setinterval(function(){                             writeline($obj)                         }, 1000);                         $obj.data('init', true);                         $obj.data('cnt',0);                     }                 });                     },             destroy: function () {                 var $obj = $(this);                 $obj.data('init', false);                 clearinterval(mytimer);                 $obj.append("destroyed!");             }         };                 $.fn.timeit = function (method) {                                if (methods[method]) {                 return methods[method].apply(this, array.prototype.slice.call(arguments, 1));             } else if (typeof method === 'object' || !method) {                 return methods.init.apply(this, arguments);             } else {                 $.error('method ' + method + ' not exist on jquery.timeit');             }         };     } )(jquery);  $('#mydiv').timeit(); $('#mydiv2').timeit();  function writeline(cobj) {     cobj.data('cnt',cobj.data('cnt')+1);     cobj.append("another line written...(" + cobj.data('cnt') + ")<br />");         if(cobj.data('cnt')>=10){         cobj.timeit('destroy');     }         } 

i think usage of variable scoped @ level fine, aside fact you're assigning value of mytimer inside of each (different context each time). if remove second wire-up ($('#mydiv2').timeit();) works champ. storing variable instance more appropriate.