Count Up goes Down!

On Firefox the system works well and counts up from "now" using the code

<?php $day=date("Y-m-d H:i:s"); ?>
<p class="timer-float"><span class="jst_timer"><span class="datetime" style="display:none;"><?php print $day; ?></span> <span class="dir" style="display:none;">up</span> <span class="format_txt" style="display:none;">%mins%:%secs%</span> </span></p>

But the system does not work on Chrome, Safari or IE. Is there a way to count up from NOW or implement a simple minute:second timer