$(document).ready( function() { $(".pwd").passStrength({ url: "../op/op.Ajax.php", minscore: <?php echo (int) $passwordstrength; ?>, onChange: function(data, target) { pws = <?php echo (int) $passwordstrength; ?>; kids = $('#'+target).children(); $(kids[1]).html(Math.round(data.strength)); $(kids[0]).width(data.strength); if(data.strength > pws) { $(kids[0]).css('background-color', 'green'); } else { $(kids[0]).css('background-color', 'red'); } } }); });