Answered $modx->regClientScript results in 2 instances of the script on the page?

<?php
require_once MODX_BASE_PATH.'assets/snippets/includeVideo/includeVideo.class.php';
$param=array();
if(isset($docid))
	$param['docid']=$docid;
        /*$docid is used to specify another document*/
if(isset($type))
	$param['type'] = $type;
        /*$type has 2 settings, default uses a modal layer to display the video (trigger by click event) and embed embeds the video in the content*/
if(isset($vimeoID))
	$param['vimeoID'] = $vimeoID;
        /*$vimeoID allows the editor to directly enter the ID in the snippet call */
$includeVideoApp = new includeVideo($param);
return $includeVideoApp->output;
?>

<?php
if(!class_exists('includeVideo')){
	class includeVideo {
		public $version = '0.0.1';
		var $basePath = MODX_BASE_PATH;
		var $params = array();
		var $debug = false;
		var $froogaloop = '/* froogaloop js code */';
		var $script;
		
		function __construct($params=array()){
			global $modx;
			$default_params = array();
			$this->params=array_merge($default_params,$params);
			$this->dispatch('BuildVideo');
		}
	
		private function BuildVideo(){
			global $modx;
			if(isset($this->params['vimeoID'])){
				$values['vimeoID'] = $this->params['vimeoID'];
			} else {
				$docid = isset($this->params['docid']) ? $this->params['docid'] : $modx->documentIdentifier;
				$values = $modx->getTemplateVarOutput('vimeoID',$docid);
			}			
			if($values['vimeoID'] != ''){
				$data = $this->getVimeoData($values['vimeoID']);
				$p = array(
					'vimeoId' => $values['vimeoID'],
					'width' => $data->width,
					'height' => $data->height
				);
				self::buildPageScript($p);
				$modx->regClientStartupScript($this->froogaloop);
				$modx->regClientScript($this->script);
				return;
			} else {
				die('No Vimeo ID was found.');
			}
		}
		private function getVimeoData($id){
			global $modx;
			require_once(MODX_BASE_PATH.'assets/lib/vimeo/vimeo.php');
			$vimeo = new phpVimeo('my consumer key', 'my consumer secret');
			$vimeo->enableCache(phpVimeo::CACHE_FILE, MODX_BASE_PATH.'assets/cache', 300);
			$dataArray = array(
				'video_id' => $id,
			);
			$videos = $vimeo->call('vimeo.videos.getInfo', $dataArray);
			$data = $videos->video[0];
			return $data;
		}

		public function dispatch($dispatch=NULL,$vars=NULL){
			if(method_exists($this, $dispatch)){
				if($this->debug){ $this->output .= '<br>Calling => '.$dispatch.'<br />'; }
				self::$dispatch($vars);
			} else {
				$this->output .= str_replace('[+dispatch+]', $dispatch,$this->lang['GlobalDispatchError']);	
			}
		}
		
		function buildPageScript($p){
			global $modx;
			$vW = $p['width'];
			$vH = $p['height'];
			$f = '$f'; //to prevent PHP from interpreting the JS $f as a variable.
			
                        if($this->params['type'] != 'embed'){
				$itemID = $this->generateRandomString(21);
				$this->script = "<script type=\"text/javascript\">
					/* event triggered modal js */
                                </script>";
			} else {
				$itemID = $this->generateRandomString(21);
				$this->output = '<iframe id="'.$itemID.'" width="100%" height="100%" frameborder="0" src="http://player.vimeo.com/video/'.$p['vimeoId'].'?title=0&byline=0&portrait=0&color=ffc423&autoplay=0&api=1&player_id='.$itemID.'" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>';
				$this->script = "<script type=\"text/javascript\" name=\"vimeo_scripts\">
					/* embedded video  js*/
				</script>";
			}
		}
		
		function generateRandomString($length = 24) {
		    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
		    $randomString = 'con';
		    for ($i = 0; $i < $length; $i++) {
		        $randomString .= $characters[rand(0, strlen($characters) - 1)];
		    }
		    return $randomString;
		}
	//-- END OF CLASS
	}
}

[[if? &is=`[+content+]:empty` &then=`[+page_main_art+]` &else=`[+content+]`]]