var arrayName = 'imgs';
var imgs = new Array();

imgs[0] = new Image();
imgs[0].src = 'img/nav/home_on.gif';
imgs[1] = new Image();
imgs[1].src = 'img/nav/news_on.gif';
imgs[2] = new Image();
imgs[2].src = 'img/nav/rapture_on.gif';
imgs[3] = new Image();
imgs[3].src = 'img/nav/articles_on.gif';
imgs[4] = new Image();
imgs[4].src = 'img/nav/downloads_on.gif';
imgs[5] = new Image();
imgs[5].src = 'img/nav/forum_on.gif';
imgs[6] = new Image();
imgs[6].src = 'img/nav/perks_on.gif';
imgs[7] = new Image();
imgs[7].src = 'img/trans.gif';
imgs[16] = new Image();
imgs[16].src = 'img/nav/spread_on.gif';

imgs[8] = new Image();
imgs[8].src = 'img/btn_tellAFriend_on.jpg';
imgs[9] = new Image();
imgs[9].src = 'img/btn_tellAFriend_off.jpg';
imgs[10] = new Image();
imgs[10].src = 'img/btn_newsletterSignUp_on.jpg';
imgs[11] = new Image();
imgs[11].src = 'img/btn_newsletterSignUp_off.jpg';

imgs[12] = new Image();
imgs[12].src = 'img/btn_submit_on.jpg';
imgs[13] = new Image();
imgs[13].src = 'img/btn_submit_off.jpg';
imgs[14] = new Image();
imgs[14].src = 'img/btn_reset_on.jpg';
imgs[15] = new Image();
imgs[15].src = 'img/btn_reset_off.jpg';

function swap(imgName, arrayPos){
	document.getElementById(imgName).src= imgs[arrayPos].src;
}