var imageDir = './images/buttons/';

var imageName = new Array();
	imageName['01'] = 'welcome';
	imageName['02'] = 'ourcompany';
	imageName['03'] = 'softfolding';
	imageName['04'] = 'comprint';
	imageName['05'] = 'posters';
	imageName['06'] = 'enquiry';
	imageName['07'] = 'viewselection';
	imageName['08'] = 'percivalnews';

function changeImg(link)
{
	var x = link;
	var navItem = document.getElementById(x);

	navItem.src= imageDir + imageName[x] + '_hover.png';
}

function changeImgBack(link)
{
	var x = link;
	var navItem = document.getElementById(x);

	navItem.src= imageDir + imageName[x] + '.png';
}