Customo field is not working inside jquery code.

function custom_js(){
?>
<?php $skill_value = update_post_meta($post->ID, 'skill_value', 19) ?>
<script>
		var myCircle = Circles.create({
			id:         '<?php the_ID();  ?>',
			radius:     80,
			value:  

			<?php if($skill_value) : ?>
				<?php echo $skill_value; ?>
			<?php else : ?>
					19
			<?php endif; ?>,
			maxValue:   100,
			width:      10,
			text:       function(value){return value + '%';},
			colors:     ['#D2D4D8',
			<?php $skill_color = get_post_meta($post->ID, 'skill_color', true) ?>
			<?php if($skill_color) : ?>
				<?php echo $skill_color; ?>
			<?php else : ?>
					'#4862A3'
			<?php endif; ?>
			],
			duration:   400,wrpClass:   'circles-wrp',textClass:  'circles-text'
		})	;
	</script>
<?php
}
add_action('wp_footer', 'custom_js');

When, i try to change value through “skill_value” or “skill_color” the value is not changed.
It all time showing default value…
please help..

https://wordpress.org/plugins/post/