<!---
a1O=new Image;
a1N=new Image;
a1O.src="/image/commu_leftM_sub1O.gif";
a1N.src="/image/commu_leftM_sub1N.gif";

a2O=new Image;
a2N=new Image;
a2O.src="/image/commu_leftM_sub2O.gif";
a2N.src="/image/commu_leftM_sub2N.gif";

a3O=new Image;
a3N=new Image;
a3O.src="/image/commu_leftM_sub3O.gif";
a3N.src="/image/commu_leftM_sub3N.gif";

function changeImg(imgId,opt){
  document.images[imgId].src = eval(imgId + opt+".src");
}

//--->