/**
* shows select options
* mode - on/off flag
* prefix - prefix for select elements' ids
* length - elements count
*/
var isSelectShown = false;

function showSelect(mode, prefix, length) {
	if(document.getElementById) {
		var display = (mode) ? "block" : "none";
		document.getElementById(prefix + "s").style.display = (mode) ? "none" : "block";
		for(var i=0; i<=length; i++) {
			document.getElementById(prefix + i).style.display = display;
		}
		isSelectShown = mode;
	}
}

/**
* shows given photo from array
* i - index of image in previews' set
*/
function view(i) {
	var tempIco = icons[i];
	document.images['ico' + i].src = icons[0].src;
	icons[i] = icons[0];
	icons[0] = tempIco;

	var tempPhoto = photos[0];
	document.images['screen'].src = photos[i].src;
	photos[0] = photos[i];
	photos[i] = tempPhoto;
}