var imo_interval = null;

function imo(n){
   if(imo_interval){
      clearInterval(imo_interval);
      imo_interval = null;
   }
   
   if(n != 0){
      imo_interval = setInterval(
         function(){
            imoel = document.getElementById('imgmove');
            if(!imoel) return;
            
            if((parseInt(imoel.style.left) + n <= 0) && (parseInt(imoel.style.left) + n >= -(parseInt(imoel.style.width) - 656))){
               imoel.style.left = (parseInt(imoel.style.left) + n)+'px';
            }
            else{
               imoel.style.left = '0px';
            }
         }
      , 10);
   }
}