var bLoad = false;

function nImg(oA) {
	if (document.images) { 
		oR = new Image(); 
		oR.src = oA; 
		return oR; 
	}
}

function iSet(){
	if (document.images) {
		nv101o = nImg("/images/nv101o.gif");
		nv102o = nImg("/images/nv102o.gif");
		nv103o = nImg("/images/nv103o.gif");
		nv104o = nImg("/images/nv104o.gif");
		nv105o = nImg("/images/nv105o.gif");
		nv106o = nImg("/images/nv106o.gif");
	}
	bLoad = true;
}

function iSwp(img, b) {
	if (document.images && bLoad) {
		img.src = '/images/'+img.id+(b?'o':'')+'.gif';
	}
}

function iSon(img){
	if(bLoad){iSwp(img, true)};
	return true;	
}

function iSof(img){
	if(bLoad){iSwp(img, false)};
	return true;	
}