function ays( url )
{
	if( confirm( "Are you sure?" ) )
	{
		location.href = url;
	}
}

var dinterval = undefined;
var pos = 0;
var end = 0;
var speed = 10;
var moving = "";
var curthumb = 0;
var thumbw = 248;
var totalpages = 0;
var perpage = 4;
function nextBlock()
{
	if( dinterval ) clearInterval( dinterval );
	
	pos = curthumb * (thumbw * perpage);
	curthumb--;
	end = curthumb * (thumbw * perpage);
	dinterval = setInterval( "moveBlockNext()", 50 );
	
	var arr = document.getElementById( "aright" );
	if(  curthumb  < 2 - totalpages )  arr.style.visibility = "hidden";
	else arr.style.visibility = "visible";
	
	arr = document.getElementById( "aleft" );
	if( curthumb == 0  )  arr.style.visibility = "hidden";
	else arr.style.visibility = "visible";
}

function prevBlock()
{
	if( dinterval ) clearInterval( dinterval );

	pos = curthumb * (thumbw * perpage);
	curthumb++;
	end = curthumb * (thumbw * perpage);
	dinterval = setInterval( "moveBlockPrev()", 50 );
	
	var arr = document.getElementById( "aright" );
	if(  curthumb < 2 -totalpages )  arr.style.visibility = "hidden";
	else arr.style.visibility = "visible";
	
	arr = document.getElementById( "aleft" );
	if( curthumb == 0  )  arr.style.visibility = "hidden";
	else arr.style.visibility = "visible";
}

function moveBlockNext()
{	
	var th = document.getElementById( "thumbline" );

	pos -= Math.ceil(speed*((pos-end)/100));
	th.style.left = pos+"px";
	
	if( pos <= end ) 
	{		
		th.style.left = end+"px";
		clearInterval( dinterval );
	}
}

function moveBlockPrev()
{	
	var th = document.getElementById( "thumbline");
	pos += Math.ceil(speed*((end-pos)/100));
	th.style.left = pos+"px";
	if( pos > (end)) clearInterval( dinterval );
}