function showhide() {
	for ( var i=0, len=arguments.length; i<len; ++i ){
		layerID = arguments[i];
		var currentRefstyle = document.getElementById(layerID).style;
		var currentRefheight = document.getElementById(layerID).offsetHeight;
		//Display modes 1 for on 0 for off
		modes = new Array
		modes[0] = 'none'
		modes[1] = 'block'
		if (layerID == 'gallery_bckg') {
			var body = document.body, html = document.documentElement;
			var htmlHeight = Math.max( body.scrollHeight, body.offsetHeight, html.clientHeight, html.scrollHeight, html.offsetHeight );
			currentRefstyle.height = (htmlHeight) + 'px';
		}
		currentRefstyle.display = (currentRefstyle.display == 'none') ? 'block' : 'none';
	}

}