Image custom field for Easy Custom Fields plugin

gistfile1.php

if ( !class_exists( "Easy_CF_Field_Image" ) ) {
	class Easy_CF_Field_Image extends Easy_CF_Field {
		public function print_form() {
			$class = ( empty( $this->_field_data['class'] ) ) ? $this->_field_data['id'] . '_class' :  $this->_field_data['class'];
			$input_class = ( empty( $this->_field_data['input_class'] ) ) ? $this->_field_data['id'] . '_input_class' :  $this->_field_data['input_class'];
			$name = ( empty( $this->_field_data['name'] ) ) ? $this->_field_data['id'] :  $this->_field_data['name'];
			$id = ( empty( $this->_field_data['id'] ) ) ? $this->_field_data['id'] :  $this->_field_data['id'];
			$label = ( empty( $this->_field_data['label'] ) ) ? $this->_field_data['id'] :  $this->_field_data['label'];
			$value = $this->get();
			$hint = ( empty( $this->_field_data['hint'] ) ) ? '' :  '<p><em>' . $this->_field_data['hint'] . '</em></p>';
			$set_title = ( empty( $this->_field_data['set_title'] ) ) ? 'Set Image' : $this->_field_data['set_title'];
			$remove_title = ( empty( $this->_field_data['remove_title'] ) ) ? 'Remove Image' : $this->_field_data['remove_title'];
			$post_id = $this->get_post_id();

			if(isset($value) && $value != ''){
				$text = '<img src="' . wp_get_attachment_url( $value ) . '?w=150"/>';
				$display = '<input type="hidden" type="text" name="%s" id="%s" value="' . $value . '"/>
							<div id="upload_image_text-%s">' . $text . '</div>';
				$remove = '&nbsp;&nbsp;&nbsp;<a class="remove-%s" href="#">%s</a>';
			}
			else{
				$display = '<input type="hidden" type="text" name="%s" id="%s" value=""/>
							<div id="upload_image_text-%s" style="display: none;"></div>';
				$remove = '&nbsp;&nbsp;&nbsp;<a class="remove-%s" href="#" style="display: none;">%s</a>';
			}

			$label_format =
				'<div class="%s">'.
				'<p><label for="%s"><strong>%s</strong></label></p>'.
				
				$display .
				'<p><a class="thickbox" id="upload_image-%s" href="'. get_admin_url() .'media-upload.php?post_id=%s&amp;type=image&amp;&amp;tab=library&amp;TB_iframe=1&amp;width=640&amp;height=534" title="%s">%s</a>' . $remove . '</p>'.
				'</div>'.
				'<script type="text/javascript">'.
				'	jQuery("#upload_image-%s").click(function() {'.
				'		obj = jQuery(this);'.
				'		window.original_send_to_editor = window.send_to_editor;'.
				'		window.send_to_editor = function(html) {'.
				'			var imgClass = jQuery("img",html).attr("class");'.
				'			var imgSrc = jQuery("img",html).attr("src");'.
				'			var thumbImg = "";'.				
				'			if (!imgClass)'.
				'				var imgClass = jQuery(html).attr("class");'.
				'			imgClass = imgClass.substring( ( imgClass.lastIndexOf( "-" ) + 1 ), imgClass.length );'.
				'			thumbImg = imgSrc;'.
 				'			obj.parent().prev().prev().val( imgClass );'.
				'			obj.parent().prev("div").html("<img src=\'" + thumbImg + "\'/>").show();'.
				'			jQuery(".remove-%s").show();'.
				'			tb_remove();'.
				'		}'.
				'	});'.
				'	jQuery(".remove-%s").click(function(){'.
				'		jQuery(this).hide().parent().prev().html("").prev().val("");'.
				'		return false;'.
				'	});'.
				'</script>';
			printf( $label_format, $class, $id, $label, $id, $id, $id, $id, $post_id, $set_title, $set_title, $id, $remove_title, $id, $id, $id );
		}
	}
}


function create_custom_fields()
{
	global $easy_cf;
	$field_data = array (
		'custom_field_properties' => array (										
			'fields' => array(
				'small_image'	=> array(
					'label' 		=> 'Small Image',
					'type' 			=> 'image',
					'id'			=> 'small_image',
					'set_title'	 => 'Set Small Image',
					'remove_title'  => 'Remove Small Image'
				),
			),
			'title' => 'Custom Field Properties',
			'context' => 'advanced',
			'pages' => array( 'post' ),
		),
	);

	$easy_cf = new Easy_CF( $field_data );
}
add_action( 'init', 'create_custom_fields' );