diff --git a/django/contrib/admin/static/admin/js/inlines.js b/django/contrib/admin/static/admin/js/inlines.js
index 64307951bb..0bfcd34124 100644
--- a/django/contrib/admin/static/admin/js/inlines.js
+++ b/django/contrib/admin/static/admin/js/inlines.js
@@ -43,7 +43,7 @@
     });
     if ($this.length && showAddButton) {
       var addButton;
-      if ($this.attr("tagName") == "TR") {
+      if ($this.prop("tagName") == "TR") {
         // If forms are laid out as table rows, insert the
         // "add" button in a new table row:
         var numCols = this.eq(-1).children().length;
diff --git a/django/contrib/admin/static/admin/js/inlines.min.js b/django/contrib/admin/static/admin/js/inlines.min.js
index 0745bf1910..b89aedd4cc 100644
--- a/django/contrib/admin/static/admin/js/inlines.min.js
+++ b/django/contrib/admin/static/admin/js/inlines.min.js
@@ -1,5 +1,5 @@
 (function(b){b.fn.formset=function(d){var a=b.extend({},b.fn.formset.defaults,d),c=b(this),d=c.parent(),i=function(a,e,g){var d=RegExp("("+e+"-(\\d+|__prefix__))"),e=e+"-"+g;b(a).prop("for")&&b(a).prop("for",b(a).prop("for").replace(d,e));a.id&&(a.id=a.id.replace(d,e));a.name&&(a.name=a.name.replace(d,e))},f=b("#id_"+a.prefix+"-TOTAL_FORMS").prop("autocomplete","off"),g=parseInt(f.val(),10),e=b("#id_"+a.prefix+"-MAX_NUM_FORMS").prop("autocomplete","off"),f=""===e.val()||0<e.val()-f.val();c.each(function(){b(this).not("."+
-a.emptyCssClass).addClass(a.formCssClass)});if(c.length&&f){var h;"TR"==c.attr("tagName")?(c=this.eq(-1).children().length,d.append('<tr class="'+a.addCssClass+'"><td colspan="'+c+'"><a href="javascript:void(0)">'+a.addText+"</a></tr>"),h=d.find("tr:last a")):(c.filter(":last").after('<div class="'+a.addCssClass+'"><a href="javascript:void(0)">'+a.addText+"</a></div>"),h=c.filter(":last").next().find("a"));h.click(function(d){d.preventDefault();var f=b("#id_"+a.prefix+"-TOTAL_FORMS"),d=b("#"+a.prefix+
+a.emptyCssClass).addClass(a.formCssClass)});if(c.length&&f){var h;"TR"==c.prop("tagName")?(c=this.eq(-1).children().length,d.append('<tr class="'+a.addCssClass+'"><td colspan="'+c+'"><a href="javascript:void(0)">'+a.addText+"</a></tr>"),h=d.find("tr:last a")):(c.filter(":last").after('<div class="'+a.addCssClass+'"><a href="javascript:void(0)">'+a.addText+"</a></div>"),h=c.filter(":last").next().find("a"));h.click(function(d){d.preventDefault();var f=b("#id_"+a.prefix+"-TOTAL_FORMS"),d=b("#"+a.prefix+
 "-empty"),c=d.clone(true);c.removeClass(a.emptyCssClass).addClass(a.formCssClass).attr("id",a.prefix+"-"+g);c.is("tr")?c.children(":last").append('<div><a class="'+a.deleteCssClass+'" href="javascript:void(0)">'+a.deleteText+"</a></div>"):c.is("ul")||c.is("ol")?c.append('<li><a class="'+a.deleteCssClass+'" href="javascript:void(0)">'+a.deleteText+"</a></li>"):c.children(":first").append('<span><a class="'+a.deleteCssClass+'" href="javascript:void(0)">'+a.deleteText+"</a></span>");c.find("*").each(function(){i(this,
 a.prefix,f.val())});c.insertBefore(b(d));b(f).val(parseInt(f.val(),10)+1);g=g+1;e.val()!==""&&e.val()-f.val()<=0&&h.parent().hide();c.find("a."+a.deleteCssClass).click(function(d){d.preventDefault();d=b(this).parents("."+a.formCssClass);d.remove();g=g-1;a.removed&&a.removed(d);d=b("."+a.formCssClass);b("#id_"+a.prefix+"-TOTAL_FORMS").val(d.length);(e.val()===""||e.val()-d.length>0)&&h.parent().show();for(var c=0,f=d.length;c<f;c++){i(b(d).get(c),a.prefix,c);b(d.get(c)).find("*").each(function(){i(this,
 a.prefix,c)})}});a.added&&a.added(c)})}return this};b.fn.formset.defaults={prefix:"form",addText:"add another",deleteText:"remove",addCssClass:"add-row",deleteCssClass:"delete-row",emptyCssClass:"empty-row",formCssClass:"dynamic-form",added:null,removed:null};b.fn.tabularFormset=function(d){var a=b(this),c=function(){b(a.selector).not(".add-row").removeClass("row1 row2").filter(":even").addClass("row1").end().filter(":odd").addClass("row2")};a.formset({prefix:d.prefix,addText:d.addText,formCssClass:"dynamic-"+