function gal_show_thumbs()
{
	$("#gal_allthumbs").show();
	$("#gal_viewer").hide();
	$("#gal_image_name").html("");		
}

function gal_click_thumb(id)
{
	$("#gal_allthumbs").hide();
	$("#gal_viewer").show();
	gal_show_image(id);
}

function gal_mouseover_thumb(id)
{
	if (gal_view_mode=='hover')
		gal_click_thumb(id);	
}

function gal_click_nav(id)
{
	gal_click_thumb(gal_nav_offset + id);
}

function gal_show_image(id)
{	
	gal_current_image = id;
	if (gal_current_image>=gal_images.length) gal_current_image = gal_images.length-1;
	if (gal_current_image<0) gal_current_image = 0;
	
	$("#gal_image").attr("src", 'cache/' + gal_image_template + '/' + gal_images[gal_current_image]);
	$("#gal_image_name").html("&raquo; "+gal_images[gal_current_image].replace( /.*\//, "" ) );
	
	gal_update_thumbs();
}

function gal_update_thumbs()
{
	mid = Math.ceil(gal_num_thumbs/2);
	
	gal_nav_offset = gal_current_image - mid + 1;
	if (gal_current_image < mid) gal_nav_offset = 0;
	if (gal_current_image > gal_images.length - mid - 1) gal_nav_offset = gal_images.length - gal_num_thumbs;
	
	for(c=0; c<gal_num_thumbs; c++)
	{
		$("#gal_nav_thumb_"+c).removeClass("gal_active");
		$("#gal_nav_thumb_"+c).attr("src", 'cache/'+gal_thumb_template+'/' + gal_images[(gal_nav_offset+c)]);
		
		if (gal_current_image == (gal_nav_offset+c))
			$("#gal_nav_thumb_"+c).addClass("gal_active");
		
	}
}

function gal_next()
{
	gal_show_image(gal_current_image+1);
	document.getElementById('current_gal_img').value = gal_current_image;
}

function gal_previous()
{
	gal_show_image(gal_current_image-1);
	document.getElementById('current_gal_img').value = gal_current_image;
}