var msgWin = window.msgWin;
/* popup pro obrazky a galerie */
function popup(alink, type) {
	var retValue = false;
	switch(type) {
		case 1: // img_from_link
			prefix = "/popup_image.php?path=";
			path = prefix + alink.href.substr(alink.href.indexOf("/img/")) + "&title=" + alink.getAttribute("TITLE");
			break;
		case 2: // gal_from_link
			prefix = "/popup_gallery.php?js=true&adr=";
			ppth = alink.href.substr(alink.href.indexOf("adr=") + 4)
			path = prefix + ppth;
			break;
	}
	
	if (msgWin != null && !msgWin.closed) { 
		msgWin.location.href = path;
		msgWin.focus();
	} else {
		msgWin = window.open(path, "_gallery","height=150,menubar=0,personalbar=0,resizable=1,scrollbars=0,toolbar=0,width=150,top=100,left=100,status=0");
		if (msgWin == null || typeof(msgWin) == "undefined") {
			retValue = true; 
			}
		else { 
			alink.target = "_gallery";
			msgWin.focus(); 
		} 
	} 
	return retValue; 
}

/* krokovani obrazku v galerii */

selImg = false;
function step(act, gal) {
 	path = "/img/galerie/" + gal + "/";
	
	var galImg = document.getElementById("galImg");
	switch(act) {
		case "next":
			toSelect = selImg ? ( selImg + 1 == gals[gal].length ? 0 : selImg + 1) : 1;
			break;
		case "back":
			toSelect = selImg ? selImg - 1 : (gals[gal].length - 1);
			break;
	}
	
	var tm = new Date();
	var suffix = tm.getTime();
	galImg.src = path + gals[gal][toSelect] + "?" + suffix;
	selImg = toSelect;
	
	return false;

}