Maybe try something like this:
+Always
->Set playerhealthbar.width to
clamp(playerhealthbar.width - 1, (player.value('health') / 100) * playerhealthbar.value('maxwidth'), playerhealthbar.value('maxwidth'))
That should work (assuming player has 100 as health max) <img src="smileys/smiley1.gif" border="0" align="middle" />