자바스크립트 팝업 문의 드려요

<script type="text/javascript" src="/modal/script.js"></script> 		    <img src="http://seaferry.co.kr/img/m_menu_2.png"  id="popUpBtn" value="Open Modal Popup" border=0 width="100" height="100"></a>

//when window loadswindow.addEventListener('load', initialize, false);function initialize() {    setTimeout(function() { window.scrollTo(0, 1); }, 10); //to hide the address bar    document.getElementById("popUpBtn").addEventListener(endEvent, function() {        showPopUpMessage(createPopUpHeader("금일 운항 스케줄")		,createPopUpContent("I am a cool modal pop up. I have gradient colors, border colors, drop shadow and I am always positioned at the center!!"),250,300);    }, false);}