var imgRoll = new Array("../img/main/footer_rela_bnr01.gif", "../img/main/footer_rela_bnr02.gif",
			"../img/main/footer_rela_bnr03.gif", "../img/main/footer_rela_bnr04.gif");
var ImgNum = 0;
var ImgLength = imgRoll.length - 1;
var delay = 3000; // 이미지간 시간 간격 (초) 
var lock = false;
var run;
function chgImg(direction) {
	if (document.images) {
		ImgNum = ImgNum + direction;
		if (ImgNum > ImgLength) {
			ImgNum = 0;
		}
		if (ImgNum < 0) {
			ImgNum = ImgLength;
		}
		document.slider_show.src = imgRoll[ImgNum];
	}
}
function auto() {
	if (lock == true) {
		lock = false;
		window.clearInterval(run);
	}
	else {
		if (lock == false) {
			lock = true;
			run = setInterval("chgImg(1)", delay);
		}
	}
}


function relation_page() {
	var objImage = document.getElementById("slider_show");
	var imgName = objImage.src.toString();
	var rightPos = imgName.lastIndexOf("/");
	var imgFile = imgName.substring(rightPos + 1, imgName.length);
	var openUrl = "";
	switch (imgFile) {
		case "footer_rela_bnr01.gif": 		// 문화관광부
			openUrl = "http://www.mcst.go.kr";
			break;
		case "footer_rela_bnr02.gif": 		// 한국잡지교육원
			openUrl = "http://www.magazineschool.co.kr";
			break;
		case "footer_rela_bnr03.gif": 	// 모아진
			openUrl = "http://www.moazine.com/main.asp";
			break;
		case "footer_rela_bnr04.gif": 	// 정기간행물협동조합
			openUrl = "http://www.kptc.or.kr";
			break;
		default:
			break;
	}
	window.open(openUrl);
}