/* 
This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Jay M. Rumsey, OD | http://www.nova.edu/~rumsey */

var num=0;

var imgArray = [

  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=B001','../images/main/product06.gif','플런저형 무맥동 정량펌프(PKP)','플런저형 무맥동..'],
  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=B002','../images/main/product07.gif','다이어프램형 연속류 무맥동 정량펌프(PKD)','다이어프램형 연속..'],
  
  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=E005','../images/main/product12.gif','BLDC자동제어 시스템','BLDC자동제어..'],

  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=D002','../images/main/product10.gif','드럼 펌프','드럼 펌프'],

  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=A001','../images/main/product01.gif','소형 정량펌프(AX)','소형 정량펌프(AX)'],
  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=A002','../images/main/product02.gif','일반 다이어프램 정량펌프(KD)','일반 다이어프램..'],
  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=A003','../images/main/product03.gif','유압 다이어프램 정량펌프(KH)','유압 다이어프램..'],
  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=A004','../images/main/product04.gif','고압 플런저 정량펌프(KP)','고압 플런저..'],
  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=A005','../images/main/product05.gif','중소형 정량펌프(KM)','중소형 정량펌프(KM)'],
  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=A007','../images/main/product23.gif','액세서리','액세서리'],



  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=C003','../images/main/product08.gif','공기구동 다이어프램 펌프','공기구동 다이어프..'],

  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=D001','../images/main/product09.gif','마그네트 펌프','마그네트 펌프'],

  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=E001','../images/main/product11.gif','서보 유니트 시스템','서보 유니트 시스템'],

  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=E003','../images/main/product13.gif','POSITION-SETTER','POSITION-SETTER'],
  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=E003','../images/main/product15.gif','이원제어 연산기','이원제어 연산기'],

  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=F001','../images/main/product16.gif','pH/ORP측정시스템','pH/ORP측정시스템'],
  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=F002','../images/main/product17.gif','Crystal P(O)808SE 시리즈','Crystal P(O)808SE..'],
  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=F003','../images/main/product18.gif','Chemical Sensor','Chemical Sensor'],

  ['http://www.cheonsei.co.kr/korean/products/product_view.aspx?product_code=G004','../images/main/product22.gif','Tank','Tank']

];


function slideshow(slide_num) {

  var  arrCount = imgArray.length ;

 //넘버가 0보다 작으면 배열의 크기만큼 곱해서.. 다시 0~ 배열의 크기까지 만듦
 if(slide_num < 0){
  var count =  parseInt( slide_num/arrCount ); 
  slide_num = (( count+1) *  arrCount) -1 ;
  num = slide_num-1;
 }

  document.getElementById('1st_link').href=imgArray[(slide_num%arrCount)][0];
  document.getElementById('1st_pic').src=imgArray[(slide_num%arrCount)][1];
  document.getElementById('1st_pic').alt=imgArray[(slide_num%arrCount)][2];
  document.getElementById('1st_burns').innerHTML=imgArray[(slide_num%arrCount)][3];

  document.getElementById('2nd_link').href=imgArray[((slide_num+1)%arrCount)][0];
  document.getElementById('2nd_pic').src=imgArray[((slide_num+1)%arrCount)][1];
  document.getElementById('2nd_pic').alt=imgArray[((slide_num+1)%arrCount)][2];
  document.getElementById('2nd_burns').innerHTML=imgArray[((slide_num+1)%arrCount)][3];

  document.getElementById('3th_link').href=imgArray[((slide_num+2)%arrCount)][0];
  document.getElementById('3th_pic').src=imgArray[((slide_num+2)%arrCount)][1];
  document.getElementById('3th_pic').alt=imgArray[((slide_num+2)%arrCount)][2];
  document.getElementById('3th_burns').innerHTML=imgArray[((slide_num+2)%arrCount)][3];

}

function slideshowUp() {
  num++;
  slideshow(num);

}

function slideshowBack() {
  num--;
  slideshow(num);
}