I'm trying to write a chrome extension to collect the post time for each message on Facebook, but when I checked the HTML of Facebook, the code for post time are displayed like:

<span class="nc684nl6 l94mrbxd l9j0dhe7 sdhka5h4 ww7X6Q8" style="order: 16;">s</span>
<span class="l94mrbxd aenfhxwr myohyog2 b6zbclly l9j0dhe7 sdhka5h4 ww7X6Q8" style="order: 1;">u</span>
<span class="t5a262vz aenfhxwr b6zbclly l9j0dhe7 sdhka5h4" style="order: 24;">y</span>

which are the letters out of order. How could I reorder them as the displayed time like "18h" "24 May at 11:00"? Or is there better way to get the post time?