function changeImage(imgname, state, where){
     var path="";
     if(where==null || where==""){
      path="../";
     }
     if(state==1){
      document.getElementById(imgname).src=path+'_common/img/'+imgname+'_hi.gif';
     }else{
      document.getElementById(imgname).src=path+'_common/img/'+imgname+'_lo.gif';
     
     }
    }