AO — scrolling blocks

<script>

//get time
jQuery.fixTime = function() {
	var dateObj = new Date();
    return Math.floor(dateObj.getTime() / 1000);
}

var startTime = jQuery.fixTime();

jQuery(window).bind('beforeunload', function(){

  	var endTime = jQuery.fixTime() - startTime;

  	// get and convert headers time
    var headers = JSON.parse(localStorage.getItem('headers'));
    var str = []
    for(var i = 0; i < headers.length-1; i++) {

	    var time =  parseInt(headers[i+1].timeEnd) - parseInt(headers[i].timeEnd);
        str.push({'name': headers[i].name, 'time': time})
    }
	// for last element
  	var time =  parseInt(headers[headers.length-1].timeStart) - parseInt(endTime);
    str.push({'name': headers[headers.length-1].name, 'time': time})

    var headers_name = {},
        headers_count = {},
        newArraySeries = []

    // count sum of time for unique headers
    str.forEach(
        function(e){
            if(!headers_name[e.name]){
                headers_name[e.name] = 0
                headers_count[e.name] = 0
            }
            // convert msec to second
            headers_name[e.name] += parseInt(e.time)/1000
            headers_count[e.name]++
        }
    )
    for(var names in headers_name){
        newArraySeries.push({name : names, data : headers_name[names]})
    }

  	// send autoEvents to GA for each header
  	newArraySeries.forEach(function(e) {
    	dataLayer.push({'event': 'autoEvent', 'eventCategory': 'AO — scrollBlocks', 'eventAction': document.title, 'eventLabel': e.name, 'eventValue': Math.round(e.data)});
        fbq('track', 'AO — scrollBlocks', {
          'eventAction': document.title,
          'eventLabel': e.name,
          'eventValue': Math.round(e.data)
        });
    })

    localStorage.removeItem('headers');

})



</script>