function i1(pImgObject) {
	try {pImgObject.src = String(pImgObject.src).replace(/_n\./, "_a.");}
	catch(e) {return 0}
}

function i0(pImgObject) {
	try {pImgObject.src = String(pImgObject.src).replace(/_a\./, "_n.");}
	catch(e) {return 0}
}

function nacistObrazky() {
	var lAI, laI = new Array();
	var dI = document.images;
	var lRE = new RegExp("(.)*(_n)\.[a-z]{3,}", "i");
	lRE.compile("(.)*(_n)\.[a-z]{3,}", "i");

	for (var i=0; i < dI.length; i++) {
		if (lRE.test(dI[i].src)) {
			(lAI = (laI[laI.length] = new Image())).src = String(dI[i].src).replace("_n\.", "_a\.");
		}
	}
}