/**
 * Navigation roll-overs
 */
function navOver( name )
{
	var id		= "nav_" + name;
	$(id).src	= "/images/nav/" + name + "-over.gif";
}
function navOut( name )
{
	var id		= "nav_" + name;
	$(id).src	= "/images/nav/" + name + ".gif";
}
function subNavOver( name, area )
{
	var id		= "subNav_" + name;
	$(id).src	= "/images/nav/" + area + "/" + name + "-over.gif";
}
function subNavOut( name, area )
{
	var id		= "subNav_" + name;
	$(id).src	= "/images/nav/" + area + "/" + name + ".gif";
}

/**
 * Swap Image
 */
function displayPortfolioImage( img, desc )
{
	$('portfolioImage').innerHTML		= '<img src="' + img + '" border="0" />';
	$('portfolioImageDesc').innerHTML	= desc;
}

/**
 * Description hide/show
 */
function showDescription()
{
	$('portfolioDescription').style.display	= "";
}
function hideDescription()
{
	$('portfolioDescription').style.display	= "none";
}

/**
 * ImageDescription hide/show
 */
function showImageDescription()
{
	$('portfolioImageDesc').style.display	= "";
}
function hideImageDescription()
{
	$('portfolioImageDesc').style.display	= "none";
}

/**
 * Pre-load images
 */
function preloadImages( type )
{
	var Images							= new Object();
	
	Images['production_metal']			= new Array();
	Images['production_metal'][0]		= '/images/portfolio/production_metal/metal_1.jpg';
	Images['production_metal'][1]		= '/images/portfolio/production_metal/metal_2.jpg';
	Images['production_metal'][2]		= '/images/portfolio/production_metal/metal_3.jpg';
	Images['production_metal'][3]		= '/images/portfolio/production_metal/metal_4.jpg';
	Images['production_metal'][4]		= '/images/portfolio/production_metal/metal_5.jpg';
	Images['production_metal'][5]		= '/images/portfolio/production_metal/metal_6.jpg';
	Images['production_metal'][6]		= '/images/portfolio/production_metal/metal_7.jpg';
	Images['production_metal'][7]		= '/images/portfolio/production_metal/metal_8.jpg';
	Images['production_metal'][8]		= '/images/portfolio/production_metal/metal_9.jpg';
	Images['production_metal'][9]		= '/images/portfolio/production_metal/metal_10.jpg';
	Images['production_metal'][10]		= '/images/portfolio/production_metal/metal_11.jpg';
	Images['production_metal'][11]		= '/images/portfolio/production_metal/metal_12.jpg';
	Images['production_metal'][12]		= '/images/portfolio/production_metal/metal_13.jpg';
	Images['production_metal'][13]		= '/images/portfolio/production_metal/metal_14.jpg';
	Images['production_metal'][14]		= '/images/portfolio/production_metal/metal_15.jpg';
	
	if( document.images && Images[ type ] != undefined )
	{
		imgObj	= new Image();
		
		//	Define the images
		images	= Images[ type ];
		
		//	Preload the images
		for( var i = 0; i < images.length; i++ )
			imgObj.src	= images[ i ];
	}
}