function m_animate(div_id, inc){
  	per_page = 5;
  	total = document.getElementById(div_id).childNodes.length;
  	boxes = new Array();
  	j=0;
  	for(i=0; i<total; i++)
  		if(document.getElementById(div_id).childNodes[i].className == "box")
  			boxes[j++] = document.getElementById(div_id).childNodes[i];
  	for(i=0; i<boxes.length; i++)		
		if(boxes[i].style.display != "none"){
			if(inc == 1 && (i+per_page) < boxes.length){
				boxes[i].style.display = "none";
				boxes[i+per_page].style.display = "block";
				break;
			}
			
			if(inc == -1 && i > 0){
				boxes[i-1].style.display = "block";				
				break;
			}
		}  		
  }