GoogleAnalyticsのイベントトラッキングタグを簡単に埋め込む

/**
Google Analytics Event Tracking Tag
google_analytics_tracker.js
 
@requred Google Analytics tag
@requred jquery
 
:class => 'js_ga_tracker', :"data-category" => '', :"data-action" => '', :"data-label" => '', :"data-num_value" => ''
 
:"data-label", :"data-num_value" is optional
 
ex)
link_to 'hoge', '/', :class => 'js_ga_tracker', :"data-category" => '', :"data-action" => '', :"data-label" => '', :"data-num_value" => ''
**/
$(function() {
  $('a.js_ga_tracker').each(function(){
    var target = $(this);
    target.click(function(){
      params = ['_trackEvent', target.data('category'), target.data('action')];
 
      if ( target.data('label') ) {
        params.push( target.data('label') );
 
        if ( target.data('num_value') && $.isNumeric( target.data('num_value')) ) {
          params.push( target.data('num_value') );
        } else {
          console.log('num_value invalid: ' + target.data('num_value'));
        }
 
      } else {
        console.log('label invalid: ' + target.data('label'));
      }
 
      _gaq.push( params );
    });
  });
});