function slideLine(ul, delay, speed, lh) {
	var slideBox = (typeof ul == 'string')?document.getElementById(ul):ul;
	var delay = delay||1000, speed=speed||20, lh = lh||20;
	var tid = null, pause = false;
	var start = function() {
		tid=setInterval(slide, speed);
	}
	var slide = function() {
		if (pause) return;
		slideBox.scrollTop += 2;	
		if (slideBox.scrollTop % lh == 0) {
			clearInterval(tid);
			slideBox.appendChild(slideBox.getElementsByTagName('li')[0]);
			slideBox.scrollTop = 0;
			setTimeout(start, delay);
		}
	}
	slideBox.onmouseover=function(){pause=true;}
	slideBox.onmouseout=function(){pause=false;}
	setTimeout(start, delay);
  }

function show_menu(obj_s,obj){
	var  s_id = document.getElementById(obj_s);
	var  sc_id = document.getElementById(obj);
	     s_id.style.display = "";
	     sc_id.className = "ahv";
     	}
     	
  function hide_menu(obj_h,obj){
	var  h_id = document.getElementById(obj_h);
	var  hc_id = document.getElementById(obj);
	     h_id.style.display = "none";
	     hc_id.className = "alk";
     	}