Custom Print Button

I have implemented the Print feature in my application but the print button is the default dojo 'Print' text and dropdown icon.

What I want to do is remove the text and border and add an icon instead of the text.

I have been following this forum post but I am not getting the mentioned result:

var img = $('<img class="inline" src="img/print_icon.png" />');
$(".esriPrintButton").children(".dijitButtonNode").children(".dijitButtonContents").prepend(img);
$(".esriPrintButton").children(".dijitButtonNode").children(".dijitButtonContents").children(".dijitButtonText").text('');

This is my code so far. I am trying to change the html in the created button div The script always run but no changes to the html.