function if_upload_file( upload_form_id ) {
	var upload_form = document.getElementById( upload_form_id );

	<!-- upload files for GIF -->

	var files_count = 0; var what = true;
	if( upload_form.name == 'gif_upload_file_form' ) {
		hide_error( 'gif_upload_file_form_error' );
		for(var i = 1; i <= 10;  i++) {
			var upload_file = document.getElementById( 'gif_upload_file_' + i );
			if( !upload_file || upload_file.style.display == 'none' ||
				upload_file.value.length == 0 ) { continue; }
			files_count = files_count + 1;
			if( ! check_file_format( upload_file.value ) ) {
				show_error( 'gif_upload_file_' + i + '_error', 'Sorry, only JPG, GIF and PNG images are supported' );
				what = false;
			}
		}
		if( !what ){ return false; }
		if( files_count < 2 ) {
			show_error( 'gif_upload_file_form_error', 'Please, select at least 2 images' );
			return false;
		}

		var WaiterObj = document.getElementById('waiter_save');
		if( WaiterObj ) {
			setTimeout( 'document.getElementById("waiter_save_img").src = "/img/design/uploading.gif"', 50 );
			WaiterObj.style.display = "block";
		}
		var SaveButtonObj = document.getElementById('save');
		SaveButtonObj.style.display = "none";

		upload_form.submit();
		return true;
	}
}

function add_gif_upload_file () {
	hide_error( 'gif_upload_file_form_error' );
	for(var i = 4; i <= 10;  i++) {
		var upload_file = document.getElementById( 'gif_upload_file_div_' + i );
		if( upload_file && upload_file.style.display == 'none' ) {
			upload_file.style.display = 'block';
			return;
		}
	}

	show_error(  'gif_upload_file_form_error', '10 pictures maximum' );
}

function del_gif_upload_file ( gif_upload_file_number ) {
	hide_error( 'gif_upload_file_form_error' );
	hide_error( 'gif_upload_file_' + gif_upload_file_number + '_error' );
	show_element( 'gif_upload_file_div_' + gif_upload_file_number );
}