javascript progressive counter -

yesterday found nice effect on website wich decided implement on projects, simple javascript progressive counter, this

obviously starts 0 x without looping , looks more smoother in live web, anyway, not find third party snipet, how can achieve this!?

progressive-counter.js

progressivecounter=function(params) {      /*      autor:      eccentric money maker <3      usage:      give progressive transition effect counter starts x y      params:      id                  ~   string      ~   identify internally counter     container           ~   object      ~   result displayed                    ~   int         ~   number start     dest                ~   int         ~   optional, number end     destfromproperty    ~   string      ~   optional, data defined "data-" on "container" specify number end     format              ~   function    ~   callback used format output     finished            ~   function    ~   callback used @ end of iteration      note:      code made snipet of code found on site, original coders idea, need share :*      */      // ...      if(typeof(progressivecounter_data)=="undefined")     progressivecounter_data={};      // ...      if( (typeof(params.id)!="string" || typeof(params.id)=="")         || typeof(params.container)!="object"         || (typeof(params.dest)=="undefined" && typeof(params.destfromproperty)=="undefined")   )     return;      // ...      params.from=parseint(params.from,10);      if(typeof(params.from)!="number")     return;      if(params.destfromproperty)     params.dest=$(params.container).data(params.destfromproperty);      params.dest=parseint(params.dest,10);      if(typeof(params.dest)!="number")     return;      if(params.from>params.dest)     return;      if(typeof(params.format)!="function")     params.format=null;      if(typeof(params.finished)!="function")     params.finished=null;      // ...      progressivecounter_data[params.id]={          container:params.container,         from:params.from,         dest:params.dest,         shrscountertimestep:10,         format:params.format,         finished:params.finished      };      // ...      progressivecounter_iterate(params.id);  }  progressivecounter_iterate=function(id) {      // ...      if(typeof(progressivecounter_data)=="undefined" || typeof(progressivecounter_data[id])!="object")     return;      // ...      var data=progressivecounter_data[id];      // ...      var delta=data.dest-data.from,         threshold=15,         lastthreshold=4,         timestepincrement=15,         numberformatted=""         ;      // ...      if(delta<threshold)     data.shrscountertimestep+=timestepincrement;      delta=math.ceil(delta*0.05);      if(data.from>=data.dest-lastthreshold){          delta=1;         data.shrscountertimestep=350;      }      data.from+=delta;      // ...      if(data.format)     numberformatted=data.format(data.from);     else     numberformatted=data.from;      // ...      if(data.from>=data.dest){          data.from=data.dest;         $(data.container).text(numberformatted);          if(data.finished)         data.finished();      }     else {          $(data.container).text(numberformatted);         settimeout(function() { progressivecounter_iterate(id); },data.shrscountertimestep);      }  }; 

basic usage

progressivecounter({      id:"stats_visits",     container:$("#element").get(0),     from:0,     dest:43800  });