// JavaScript Document
		var pos= 0;
		var vit = 0;
		var pas = 3;
		var tem;
		
		function defil(sens){
			var obj = document.getElementById("div_2");
			
			var total = document.getElementById("tab_id").offsetHeight;
			
			if(sens == 'b' && (total + pos) > 291){
				pos -= pas;
			}  else if(sens == 't' && pos < 0) {
				pos += pas;	
			}
			
			obj.style.top = pos + 'px';
			
			/*if(pos <= -(total + 291)){
				pos+= pas;
				//alert(pos + "<=" + (-total + 291));
			} */					
			
			if(pos < 0) {			
				tem = setTimeout("defil('" + sens + "')", vit);
			}
		}
		
		function stop_defil(){
			incr=0;
			clearTimeout(tem);
		}
		
		
		function test_defil(){
			
			var total = document.getElementById("tab_id").offsetHeight;
			if(total < 310) {
				document.getElementById("fleche_haut").style.visibility="hidden";
				document.getElementById("fleche_bas").style.visibility="hidden";
			}
		}