$(document).ready(function() {
  var elements = $('.bkspan p').each(function(index, value){
  	var h = $(value).height();
  	var h2 = $(value).parent().height();
  	$(value).css('padding-top', (h2-h)/2);
  });
  
    /*var elements2 = $('.bkspan2 p').each(function(index, value){
  	var h = $(value).height();
  	var h2 = $(value).parent().height();
  	alert(h2);
  	$(value).css('padding-top', (h2-h)/2);
  });*/
  
});