var isDOM = (document.getElementById ? true : false); 
var isIE4 = ((document.all && !isDOM) ? true : false); 
var isNS4 = (document.layers ? true : false); 
var isNS = navigator.appName == "Netscape"; 

function getRef(id) { 
if (isDOM) return document.getElementById(id); 
if (isIE4) return document.all[id]; 
if (isNS4) return document.layers[id]; 
} 

function getSty(id) { 
x = getRef(id); 
return (isNS4 ? getRef(id) : getRef(id).style); 
} 

var speed = 5; //작을 수록 빠름.. 
var fixWidth = 883; //고정 픽셀 

function moveRightEdge() { 
var yMenuFrom, yMenuTo, yOffset; 
var loopTime = 10; //1000 = 1초, 100 = 0.1초 

if (isNS4) { 
	yMenuFrom = _floater.top-460; 
	yMenuTo = windows.pageYOffset; // 위쪽 위치 
	var pWidth = window.innerHeight; //브라우져 안쪽 가로 길이 
} else if (isDOM) { 
	yMenuFrom = parseInt (_floater.style.top, 10)-460;
	yMenuTo = (isNS ? window.pageYOffset : ((document.documentElement.scrollTop) ? document.documentElement.scrollTop:document.body.scrollTop)); // 위쪽 위치 
	var pWidth = (isNS ? window.innerWidth -14 : document.body.clientWidth);; //브라우져 안쪽 가로 길이 
} 

//if( pWidth > fixWidth ) _floater.style.left = (pWidth / 2 ) + ( fixWidth / 2) 
_floater.style.left = fixWidth + "px";
//alert(document.documentElement.scrollTop);
if (yMenuFrom != yMenuTo) { 
yOffset = Math.ceil(Math.abs(yMenuTo - yMenuFrom) / speed); 
if (yMenuTo < yMenuFrom) 
yOffset = -yOffset; 
if (isNS4) 
_floater.top += yOffset; 
else if (isDOM) 
_floater.style.top = parseInt (_floater.style.top, 10) + yOffset; 
} 
//alert(_floater.style.top);
setTimeout ("moveRightEdge()", loopTime); 
} 

document.write('<div id="floater" style="left: 883; top:460; z-index:1; visibility: visible; position: absolute"> ');
document.write('<a href="#top" onfocus="this.blur();">');
document.write('<img src="/prism/exper/img/ex_img18.gif">');
document.write('</a>');
document.write('</div>');


//div 밑에 위치해야 한다. 
//오른쪽 스크롤 스크립트 시작 

if (isNS4) { 
	var _floater = document["floater"]; 
	_floater.top = top.pageYOffset; 
	_floater.visibility = "visible"; 
	moveRightEdge(); 
} else if (isDOM) { 
	var _floater = getRef('floater'); 
	_floater.style.top = (isNS ? window.pageYOffset : document.body.scrollTop);// + 100; 
	_floater.style.visibility = "visible"; 
	moveRightEdge(); 
}