function swapMainImg() {
	var imgMain = document.getElementById('imgMain');
	var descrMain = document.getElementById('descrMain');
	if (arguments.length == 1) {
		imgMain.src = arguments[0].src.replace("thumb","normal");
		descrMain.value = arguments[0].alt;
	} else {
		imgMain.src = mainImgSrc;
		descrMain.value = mainImgAlt;
	}
}

function enlarge() {
	if (arguments.length == 1) {
		url = arguments[0].replace("thumb","large").replace("small","large").replace("normal","large").replace("page","large");
		window.open("enlargedc11.html?img="+url,'kbhenlarge','width=300,height=200,top=100,left=200');
	}
}