x_l = 0; x_r = -2763; w = 921;
x1 = 0;x2 = 0;direct = 'stop';s = 33;
function marg(x)
{document.getElementById('frames').style.marginLeft=x+'px';//alert (document.getElementById('frames').style.marginLeft);
}
function dis(id, mode)
{document.getElementById(id).style.display=mode;
}

function scroll()
{
	if (direct == 'right' && x1 >= x2) {x1 -= s; if (x1 < x2) x1 = x2;}
	if (direct == 'left' && x1 <= x2) {x1 += s; if (x1 > x2) x1 = x2;}
	marg(x1);
	if (x1 != x2) setTimeout("scroll()",0);	
	else 
	{
		if (x1 == x_l) {dis('l', 'none');dis('r', 'block');} 
		if (x2 == x_r) {dis('r', 'none');dis('l', 'block');} 
		//x2-=w;
		direct = 'stop';
	}
}

function setscroll(dir)
{
		//alert(" x_l "+x_l+" x_r "+x_r+" x1 "+x1+" x2 "+x2);
	if (dir == 'left') 
		if (x2 <= (x_l + w)) x2+=w;
	if (dir == 'right') 
		if (x2 >= (x_r + w)) x2-=w;
	direct = dir;
	dis('l', 'block');dis('r', 'block');
	scroll();
}