/************************ Contents Image ********************************/
var imgContentsInfo = [
    ['image/job_banner_1.jpg', '세무회계/경영/경제서적 할인몰 및 온라인 강좌 itaxbook.com', 'http://itaxbook.com'],
    ['image/job_banner_2.jpg', '더존e러닝', 'http://duzon.ieduforever.com/'],
    ['image/job_banner_3.jpg', '더존IT그룹의 공식지정 교육기관! 더존BIZ아카데미', 'http://www.duzonbiz.co.kr/main/main.asp']
];

// delay time
var intChangeTime = 3;
var intNowImgNo = 0;

function ChangeImage() {

    var objConImg = document.getElementById('contents_img');
    var objConA = document.getElementById('contents_a');

    var objConOne = document.getElementById('con_one');
    var objConTwo = document.getElementById('con_two');
    var objConThree = document.getElementById('con_three');

    objConImg.src = imgContentsInfo[intNowImgNo][0];
    objConImg.alt = imgContentsInfo[intNowImgNo][1];
    objConA.href = imgContentsInfo[intNowImgNo][2];

    switch (intNowImgNo + 1) {
        case 1:
            objConOne.src = "image/bn_num1_on.gif";
            objConTwo.src = "image/bn_num2_off.gif";
            objConThree.src = "image/bn_num3_off.gif";
            break;
        case 2:
            objConOne.src = "image/bn_num1_off.gif";
            objConTwo.src = "image/bn_num2_on.gif";
            objConThree.src = "image/bn_num3_off.gif";
            break;
        case 3:
            objConOne.src = "image/bn_num1_off.gif";
            objConTwo.src = "image/bn_num2_off.gif";
            objConThree.src = "image/bn_num3_on.gif";
            break;
    }

    if (intNowImgNo < (imgContentsInfo.length - 1)) {
        intNowImgNo++;
    } else {
        intNowImgNo = 0;
    }

    setTimeout('ChangeImage();', intChangeTime + '000');
}

function selectNum(obj) {
    intNowImgNo = obj - 1;

    var objConImg = document.getElementById('contents_img');
    var objConA = document.getElementById('contents_a');

    var objConOne = document.getElementById('con_one');
    var objConTwo = document.getElementById('con_two');
    var objConThree = document.getElementById('con_three');

    objConImg.src = imgContentsInfo[obj - 1][0];
    objConImg.alt = imgContentsInfo[obj - 1][1];
    objConA.href = imgContentsInfo[obj - 1][2];

    switch (obj) {
        case 1:
            objConOne.src = "image/bn_num1_on.gif";
            objConTwo.src = "image/bn_num2_off.gif";
            objConThree.src = "image/bn_num3_off.gif";
            break;
        case 2:
            objConOne.src = "image/bn_num1_off.gif";
            objConTwo.src = "image/bn_num2_on.gif";
            objConThree.src = "image/bn_num3_off.gif";
            break;
        case 3:
            objConOne.src = "image/bn_num1_off.gif";
            objConTwo.src = "image/bn_num2_off.gif";
            objConThree.src = "image/bn_num3_on.gif";
            break;
    }
}