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//vertically align element to the middle of its parent
function vAlign(){
  if(jQuery('.v-align').length){
    var jQueryvaChild = jQuery('.v-align');
    jQueryvaChild.each(function(){
      var vaChildHeight = jQuery(this).height();
      var vaParentHeight = jQuery(this).parent().height();
      var topOffset = (vaParentHeight - vaChildHeight) / 2;
      jQuery(this).css('paddingTop', topOffset).addClass('show');
    });
  }
}