var pos_precedente;
pos_precedente = location.search.substring(1, location.search.length);

var pos;
function position(){
if (document.documentElement && document.documentElement.scrollTop)
        pos = document.documentElement.scrollTop;
else if (document.body)
        pos = document.body.scrollTop
}
document.onmousedown=position;

var timeout;
var y = 0;
var step;
var step_up = 10;

function scroll_down(){
 	if (y < Number(pos_precedente)){
 		y=Number(pos_precedente);
 	}
 	window.scroll(0,y);
 	y=y + step;
 	timeout=setTimeout("scroll_down()",10);
 	if(y> document.getElementsByName("ancre")[0].offsetTop){
 		clearTimeout(timeout);
 	}
}

function scroll_up(){
 	if (y >Number(pos)){
 		y=Number(pos);
 	}
 	window.scroll(0,y);
 	y=y - step_up;
 	timeout=setTimeout("scroll_up()",1);
 	if(y < document.getElementsByName("haut")[0].offsetTop){
 		clearTimeout(timeout);
 	}
}

function MM_callJS(jsStr) {
	return eval(jsStr)
}