[jQuery] elements order

[jQuery] elements order

Hi!
I have the folowing HTML code:
<span style="font-family: monospace;">
</span><<span class="start-tag">h1</span><span class="attribute-name"></span><span class="attribute-value"></span>>heading 1</
<span class="end-tag">h1</span>>
<<span class="start-tag">h2</span><span class="attribute-name"></span><span class="attribute-value"></span>>heading 1.2 a </<span class="end-tag">h2</span>>
<<span class="start-tag">
h3</span><span class="attribute-name"></span>>heading 1.2.3 a </<span class="end-tag">h3</span>>
<<span class="start-tag">h3</span><span class="attribute-name"></span>>heading 1.2.3 b </<span class="end-tag">
h3</span>>
<<span class="start-tag">h2</span><span class="attribute-name"></span>>heading 1.2 b </<span class="end-tag">h2</span>>
<<span class="start-tag">h3</span><span class="attribute-name"></span>