var roll_onImg = new Array();
var roll_offImg = new Array();

function rollSwapInit(imgName,imgActive,imgNormal) {
	roll_onImg[imgName] = eval("new Image()");
	roll_offImg[imgName] = eval("new Image()");
	roll_onImg[imgName].src = imgActive;
	roll_offImg[imgName].src = imgNormal;
	return true;
}

function rollOn(imgName) {
	if (document.images) { 
		imgOn = roll_onImg[imgName].src;
		document ['roll'].src = imgOn;
	}
}

function rollOff(imgName) {
	if (document.images) {
		imgOff = roll_offImg[imgName].src;
		document ['roll'].src = imgOff;
	}
}

var nav_imgPath = 'images/nav/';
var gnav_names = new Array('roll','bio','music','chat','links','contact','onStage','news');

for (var i=0; i<gnav_names.length; i++) {
	if (i != 0) {
		imgName =  gnav_names[i];
		imgNormal = "images/px.gif";
		imgActive = nav_imgPath + "gnav_" + gnav_names[i] + "_o.gif";
		rollSwapInit(imgName,imgActive,imgNormal);
	}
}