function ChangeImage(index,flag)
{
 if(flag==1)
 {
  if(index==1) document.home.src="./images/homeup.gif";
  if(index==2) document.company.src="./images/companyup.gif";
  if(index==3) document.products.src="./images/productsup.gif";
  if(index==4) document.recruit.src="./images/recruitup.gif";
  if(index==5) document.download.src="./images/downloadup.gif";
 }
 else if(flag==0)
 {
  if(index==1) document.home.src="./images/home.gif";
  if(index==2) document.company.src="./images/company.gif";
  if(index==3) document.products.src="./images/products.gif";
  if(index==4) document.recruit.src="./images/recruit.gif";
  if(index==5) document.download.src="./images/download.gif";
 }
}