///////////////////////////////////////////////////////////////////////////
// Image rollover functions

function makeArray() { // JS1.0-compatible
	var args = makeArray.arguments;
    	for (var i = 0; i < args.length; i++) {	this[i] = args[i]; }
	this.length = args.length;
}
var imageNames = new makeArray(
		"allphotoatoz",
		"allphotobyphotog",
		"allphotobyyear",
		"allphotomenu",
		"allplates",
		"portraits",
		"stilllifes",
		"flowers",
		"nudes",
		"views",
		"landscapes",
		"urban",
		"design",
		"sports",
		"circus",
		"main",
		"chapters",
		"preface",
		"myeye",
		"acknowledgments",
		"photocredits",
		"buythebook",
		"amazon",
		"barnes",
		"textup",
		"textdown"
	);

var imagePrefix = "../images/nav/roll_";
var imageOnSuffix = "_on.gif";
var imageOffSuffix = "_off.gif";

// preload gifs
if (document.images) {
	var i;
	var imagesOn = new Array();
	for ( i=0 ; i<imageNames.length ; i++ ) {
		imagesOn[i] = new Image();
		imagesOn[i].src = (imagePrefix + imageNames[i] + imageOnSuffix);
		
	}
}
// rollover functions
function img_act(target) {
	if (document.images)
		document[target].src = (imagePrefix + target + imageOnSuffix);
}
function img_inact(target) {
	if (document.images)
		document[target].src = (imagePrefix + target + imageOffSuffix);
}