// Global variables
var catalogue_img1 = new Image;
var catalogue_img2 = new Image;
var catalogue_img3 = new Image;
var catalogue_img4 = new Image;

function preload_catalogue_images()
{
	catalogue_img1.src = 'images/general/view-catalogue.png';
	catalogue_img2.src = 'images/general/view-catalogue-roll.png';
	catalogue_img3.src = 'images/general/view-catalogue.png';
	catalogue_img4.src = 'images/general/view-catalogue-roll.png';
}

function swap_catalogue_img1()
{
	document.getElementById("catalogue").src = catalogue_img1.src;
}

function swap_catalogue_img2()
{
	document.getElementById("catalogue").src = catalogue_img2.src;
}

function swap_catalogue_img3()
{
	document.getElementById("cataloguea").src = catalogue_img3.src;
}

function swap_catalogue_img4()
{
	document.getElementById("cataloguea").src = catalogue_img4.src;
}