function scrollTops(){
    if(document.documentElement.scrollTop == 0){
      document.getElementById('top_fixed').style.borderBottomColor="#ccc"; 
    }else{
	 document.getElementById('top_fixed').style.borderBottomColor="#06f"; 
	}
	  
  }
  window.onscroll=scrollTops;
  window.onload=scrollTops;