function left1()  {
var object = document.getElementById('images');
for (var childItem in object.childNodes) {

	if (object.childNodes[childItem].className == 'active')
	{
		var idd = object.childNodes[childItem].id;
		var length = idd.length;
		var substr = idd.substring('thumb_'.length,length);
		if (substr > 1)
		{
			object.childNodes[childItem].className = 'thumb';
			object.childNodes[childItem - 2].className = 'active'}
		}
	}
}

function right()  {
var object = document.getElementById('images');
var max_number = max();
var display1 = display();

if (parseInt(display1) + 3 < max_number)
{
for (var childItem in object.childNodes) {

if (object.childNodes[childItem].className == 'active')
{

var idd = object.childNodes[childItem].id;
if (idd != null)
{
	var length = idd.length;
	if (length > 5)
		{
		
			if (idd.substring(0,5) == 'thumb')
			{
				var substr = idd.substring('thumb_'.length,length);
				//alert(substr);
				if (parseInt(substr) < max_number)
				{
					var number = parseInt(substr) + 1;
					//alert(number);
					if ((parseInt(display1) + 4 == number) && (number <= max_number))
					{
						step(number, max_number);
					}
					document.getElementById('thumb_' + substr).className = 'thumb';
					document.getElementById('thumb_' + number).className = 'active';
					//var floatimg = document.getElementById('image_src');
					//floatimg.src = 'images/car' + number + '.jpg';
					break;
				}
			}
		}
}

}
}
}
}

function left()  {
var object = document.getElementById('images');
var max_number = max();
var display1 = display();

for (var childItem in object.childNodes) {

if (object.childNodes[childItem].className == 'active')
{

var idd = object.childNodes[childItem].id;

if (idd != null)
{
	var length = idd.length;
	
	if (length > 5)
		{
		
			if (idd.substring(0,5) == 'thumb')
			{
			
				var substr = idd.substring('thumb_'.length,length);
				if (parseInt(substr) <= max_number)
				{
					var number = parseInt(substr) - 1;
					if ((parseInt(display1) > number) && (number > 0))
					{
						step_left(number, max_number);
					}
					
					if (number > 0)
					{
						document.getElementById('thumb_' + substr).className = 'thumb';
						document.getElementById('thumb_' + number).className = 'active';
						//var floatimg = document.getElementById('image_src');
						//floatimg.src = 'images/car' + number + '.jpg';
					}
				}
			}
		}
}
break;
}
}
}

function step(number, max_number)
{
	
	var object = document.getElementById('images');
	for (var x = 1; x <= max_number; x++)
	{
	
		if ((number > x) && ((number - x) > 3))
		{
			/*alert(number);
			alert(x);*/
			document.getElementById('thumb_' + x).style.display = "none";
		}
		if ((number == x))
		{
			//alert(number);
			document.getElementById('thumb_' + x).style.display = "block";
		}
		
	}
}

function step_left(number, max_number)
{
	
	var object = document.getElementById('images');
	for (var x = 1; x <= max_number; x++)
	{
		/*if (number > x)
		{
			alert(number);
			alert(x);
			document.getElementById('thumb_' + x).style.display = "none";
		}*/
		if ((number >= x) && ((number - 3) <x))
		{
			document.getElementById('thumb_' + number).style.display = "block";
			document.getElementById('thumb_' + (number + 4)).style.display = "none";
			break;
		}
		
	}
}


function display()
{
var object = document.getElementById('images');
for (var childItem in object.childNodes) {
	var idd= object.childNodes[childItem].id;
	if ((idd != null) && (idd.substring(0,5) == 'thumb'))
	{
		var style = document.getElementById(idd).style.display;
		var length = idd.length;
		if ((style == "block") && (style != null))
		{
		
			var substr = idd.substring('thumb_'.length,length);
			//alert(substr);
			break;
		}
	}
}
return substr;
}    

function max() {
var object = document.getElementById('images');
var max = 0;

for (var childItem in object.childNodes) {
	var idd = object.childNodes[childItem].id;
	if (idd != null)
	{
	var length = idd.length;
		if (length > 5)
		{
			if (idd.substring(0,5) == 'thumb')
			{
				var substr = idd.substring('thumb_'.length,length);
				if (max < parseInt(substr))
				{max = parseInt(substr);}
			}
		}
		
	}

}
return max;
}

function active(number)
{
	var max_number	= max();
	for (var x = 1; x <= max_number; x++)
	{
		document.getElementById('thumb_' + x).className='thumb';
	}
	
	document.getElementById('thumb_' + number).className='active';
	var floatimg = document.getElementById('image_src');
	floatimg.src = 'images/car' + number + '.jpg';
	
}


function object() {
var object = document.getElementById('images');
return object;
}