var tag_subfield_line = $('.subfield_line[id^=subfield' + heading.tag + '9]').eq(tag_index);
if( tag_subfield_line.length < 1 ){ return; }
var tag_subfield_line = $('.subfield_line[id^=subfield' + heading.tag + '9]').eq(tag_index);
if( tag_subfield_line.length < 1 ){ return; }