function displayLayer(layerName){
	//layers
	MM_showHideLayers('colorsDiv','','hide');
	MM_showHideLayers('upgradesDiv','','hide');
	MM_showHideLayers('specsDiv', '', 'hide');
	MM_showHideLayers('reviewsDiv', '', 'hide');
	MM_showHideLayers(layerName + 'Div','','show');
	//tabs
	MM_swapImage('colorsImage','','images/producttabs/colors-off.jpg');
	MM_swapImage('upgradesImage','','images/producttabs/upgrades-off.jpg');
	MM_swapImage('specsImage', '', 'images/producttabs/specs-off.jpg');
	MM_swapImage('reviewsImage', '', 'images/producttabs/reviews-off.jpg');
	MM_swapImage(layerName + 'Image','','images/producttabs/' + layerName + '-on.jpg');
}
function displayDraperyLayer(layerName){
	//layers
	for(i=0;i<colorLayer.length;i++){
	    MM_showHideLayers(colorLayer[i],'','hide');
	}
	MM_showHideLayers(layerName,'','show');	
}