function changeDeliveryTime ( selected, id, empty_value ) {
	var element = $( id );
	var iterator = 1;
	
	element.options.length = 0;
	
	if( empty_value != '' ) {
		element.options[0] = new Option( empty_value, '' );
	}
	
	
	for ( var i in districts[selected] ) {
		
		if ( districts[selected][i] && typeof districts[selected][i] == 'string' ) {
		
			element.options[iterator] = new Option( districts[selected][i], i );
			iterator = iterator + 1;
		}
	}
	
	
	if( empty_value != '' ) {
		element.options[0].selected = true;
	} else {
		element.options[0] = null;
	}
}

function changeImage( item_id ) {
	
	var objBigImage = $( 'big_image' );
	
	if ( objBigImage && item_id !== '' ) {
		objBigImage.src = images[item_id]['src'];
		objBigImage.alt = images[item_id]['name'];
		objBigImage.style.width = images[item_id]['width'] + 'px';
		objBigImage.style.height = images[item_id]['height'] + 'px';
	}
}