function nav_over(id)
{
	var nav_id_off = 'nav_' + id + '_off';
	var nav_id_on = 'nav_' + id + '_on';
	
	document.getElementById(nav_id_off).style.display = 'none';
	document.getElementById(nav_id_on).style.display = 'block';
	
}

function nav_out(id)
{
	var nav_id_off = 'nav_' + id + '_off';
	var nav_id_on = 'nav_' + id + '_on';
	
	document.getElementById(nav_id_off).style.display = 'block';
	document.getElementById(nav_id_on).style.display = 'none';
	
}

var cur_thumb = 1;

function img_over(id, num)
{
	if(num != cur_thumb)
	{
		document.getElementById(id).style.border = '5px solid #ACDDC1';
		document.getElementById(id).style.cursor = 'pointer';
	}
}

function img_out(id, num)
{
	if(num != cur_thumb)
	{
		document.getElementById(id).style.border = '0px';
	}
}

function img_change(file_path, num)
{
	var img_id = 'img_' + cur_thumb;
	document.getElementById(img_id).style.border = '0px';
	
	cur_thumb = num;
	document.getElementById('main_img').src = file_path;
}