var brandImages = { 
	"home" : "images/midcol_home.jpg", "cmfilogo" : "images/midcol_home.jpg", "marketing" : "images/midcol_marketing.jpg", "studio" : "images/midcol_studio.jpg", "environmental" : "images/midcol_environmental.jpg", "color" : "images/midcol_color.jpg", "media" : "images/midcol_media.jpg", "presentations" : "images/midcol_presentations.jpg", "direct" : "images/midcol_direct.jpg", "fulfillment" : "images/midcol_fulfillment.jpg", "printing" : "images/midcol_printing.jpg", "promotional" : "images/midcol_promotional.jpg", "wearables" : "images/midcol_wearables.jpg", "casestudies" : "images/midcol_casestudies.jpg", "contact" : "images/midcol_contact.jpg", "topnav" : "images/topnav.gif", "healthcareforms" : "images/midcol_medforms.jpg", "calendars" : "images/midcol_calendars.jpg", "branding_btn" : "images/branding-iron-facts-hover.gif" 
}; 

function showImages(id) { 
	var midcol = document.getElementById('midcolimage'); 
	midcol.src = brandImages[id]; 
} 

function restoreImages(id) { 
	var midcol = document.getElementById('midcolimage'); 
	midcol.src = brandImages[id]; 
} 

function preload(img, key ) { 
	var a=new Image(); 
	a.src=img; return a; 
	} 
	
for (var x in brandImages) { 
	preload(brandImages[x], x ); 
}