var bLoad = false;
var sPath = '';

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

function iSet(p){
	sPath = (typeof(p)=='undefined'?'':p);
	if (document.images) {
		nv101o = nImg(sPath+'_img/nv101o.gif');
		nv102o = nImg(sPath+'_img/nv102o.gif');
		nv103o = nImg(sPath+'_img/nv103o.gif');
		nv104o = nImg(sPath+'_img/nv104o.gif');
		nv105o = nImg(sPath+'_img/nv105o.gif');
		nv106o = nImg(sPath+'_img/nv106o.gif');
	}
	bLoad = true;
}

function iSwp(img, b) {
	if (document.images && bLoad) {
		img.src = sPath+'_img/'+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;	
}