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 ShowDivQuick(){
	var divQuick = '<DIV id=\"divMenu\" style=\"position:absolute;DISPLAY: inline; WIDTH: 54px; HEIGHT: 15px\" ms_positioning=\"FlowLayout\">';
	divQuick += '<table width=\"54\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">';
	divQuick += '<tr>';
	divQuick += '<td><a href=\"javascript:GoTop()\"><img src=\"/images/top_button.gif\" border=0></a></td>';
	divQuick += '</tr>';
	divQuick += '</table>';
	divQuick += '</DIV>';
	document.write(divQuick);
	
	if (isNS4) {
		var divMenu = document["divMenu"];
		divMenu.top = top.pageYOffset + 50;
		divMenu.visibility = "visible";
		moveRightEdge();
	}else if (isDOM) {
		var divMenu = getRef('divMenu');
		divMenu.style.top = (isNS ? window.pageYOffset : document.body.scrollTop) + 150;
		divMenu.style.visibility = "visible";
		moveRightEdge();
	}
}

function moveRightEdge() {
	var yMenuFrom, yMenuTo, yOffset, timeoutNextCheck;

	if (isNS4) {
		yMenuFrom   = leftdiv.top;
		yMenuTo     = windows.pageYOffset;   // À§ÂÊ À§Ä¡
	} else if (isDOM) {
		yMenuFrom   = parseInt (divMenu.style.top, 10);
		yMenuTo     = (isNS ? window.pageYOffset : document.body.scrollTop) + 160; // À§ÂÊ À§Ä¡
	}
	timeoutNextCheck = 40;

	if (yMenuFrom != yMenuTo) {
		yOffset = Math.ceil(Math.abs(yMenuTo - yMenuFrom) / 20);
		if (yMenuTo < yMenuFrom)
			yOffset = -yOffset;
		if (isNS4)
			leftdiv.top += yOffset;
		else if (isDOM)
			divMenu.style.top = parseInt (divMenu.style.top, 10) + yOffset;
			timeoutNextCheck = 10;
	}

	if(document.body.clientWidth <= 900){
		divMenu.style.left = "905px";
	} else {
		divMenu.style.left = 905+((document.body.clientWidth - 900)/2) + "px";
	}
	
	//2010-02-12 µðÀÚÀκ¯°æÀ¸·Î ÀÎÇØ °­Á¦À§Ä¡ Àû¿ë
	divMenu.style.left = "920px";
	setTimeout ("moveRightEdge()", timeoutNextCheck);
}



function GoTop() {
	window.scrollTo(0,0);
}