var hideMe = new Array("allProductsArea" , "gmProductsArea" , "fordProductsArea" , "dodgeProductsArea" , "nissanProductsArea" , "toyotaProductsArea");

function toggleLayer( whichLayer ){
	hideLayers();
	var elem, vis;
	if( document.getElementById ) // this is the way the standards work
		elem = document.getElementById( whichLayer );
	else if( document.all ) // this is the way old msie versions work
		elem = document.all[whichLayer];
	else if( document.layers ) // this is the way nn4 works
		elem = document.layers[whichLayer];
	vis = elem.style;
	// if the style.display value is blank we try to figure it out here
	if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
		vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
	vis.display = (vis.display==''||vis.display=='block')?'none':'block';
}

function hideLayers(){
	var elem, vis;
	for( i = 0 ; hideMe[i] != null ; i++){
		if( document.getElementById ) // this is the way the standards work
			elem = document.getElementById( hideMe[i] );
		else if( document.all ) // this is the way old msie versions work
			elem = document.all[hideMe[i]];
		else if( document.layers ) // this is the way nn4 works
			elem = document.layers[hideMe[i]];
		vis = elem.style;
		// if the style.display value is blank we try to figure it out here
		vis.display = 'none';
	}
}