navOffImageNames = new Array(
'images/nav_portfolio.gif',
'images/nav_resume.gif',
'images/nav_contact.gif'
);

navOnImageNames = new Array(
'images/nav_portfolio_on.gif',
'images/nav_resume_on.gif',
'images/nav_contact_on.gif'
);

navOnAr = new Array();
navOffAr = new Array();

for(i=0; i<navOffImageNames.length ; i++){
	navOnAr[i] = new Image();
	navOnAr[i].src = navOnImageNames[i]
	navOffAr[i] = new Image();
	navOffAr[i].src = navOffImageNames[i]
}

function swap(onOff,num,imgName){
	document.images[imgName].src = eval('nav' + onOff + 'Ar[' + num + '].src' )
	
	
}