// JavaScript Document


function countback(page, refer)     //LEFT
{	



if (page!=undefined&&refer!=undefined)
{pp=page;rr=refer;}

s=(rr/1024)-(pp/1024);


document.getElementById('header').style.backgroundPosition="-"+xx+"px 0";


	if(rr-(519*s)<xx)
	{
	yy=yy+1;
	xx=xx-yy;
	tt=setTimeout("countback()",15)
	}
	else if(pp<xx-1)
	{
	yy=yy-1;;
	xx=xx-yy;
	tt=setTimeout("countback()",15)
	
	}

	else if(xx<=pp+1)
	{document.getElementById('header').style.backgroundPosition="-"+pp+"px 0";window.clearTimeout(tt);}


}





function count(page, refer)				//RIGHT
{	
	
if (page!=undefined&&refer!=undefined)
{pp=page;rr=refer;}

mm=(pp/1024)-(rr/1024);

m=506*mm;

document.getElementById('header').style.backgroundPosition="-"+x+"px 0";



	if(x<=pp-m)
	{
	y=y+1;
	x=x+y;
	t=setTimeout("count()",15);
	}
	else if(x<pp)
	{
	y=y-1;
	x=x+y;
	t=setTimeout("count()",15);
	}
	else if(x>=pp)
	{clearTimeout(t);document.getElementById('header').style.backgroundPosition="-"+pp+"px 0";}


}



function drive(page, refer)
{
var page=page;
var refer=refer;




x=1+refer;y=1;
xx=refer-1;yy=0;

	if((page&&(refer||refer==""))&&(page!=refer))
	{
		if(page<refer)
		{countback(page, refer);document.getElementById('header').style.backgroundPosition="-"+refer+"px 0";}
		else
		{count(page, refer);document.getElementById('header').style.backgroundPosition="-"+refer+"px 0";}
	}
}