// Predeclare Images

        if (document.images)
        {
                A = new Image();
                A.src = "http://www.chambersdesignco.com/images/home/healthcare-interior-design-sketch.jpg";
                A_on = new Image();
                A_on.src = "http://www.chambersdesignco.com/images/home/healthcare-interior-design.jpg";
				
				B = new Image();
                B.src = "http://www.chambersdesignco.com/images/home/medical-office-interior-design-sketch.jpg";
                B_on = new Image();
                B_on.src = "http://www.chambersdesignco.com/images/home/medical-office-interior-design.jpg";
				
				C = new Image();
                C.src = "http://www.chambersdesignco.com/images/home/commercial-interior-design-sketch.jpg";
                C_on = new Image();
                C_on.src = "http://www.chambersdesignco.com/images/home/commercial-interior-design.jpg";
				
	
            }
			


//  Function for Image On or Off

function change(img,act)
{ if (document.images) 
  { if (act=="on")  
    { document [img].src = eval(img+'_on.src'); 
     } 
    else
    { document [img].src = eval(img+'.src');} 
  } 
}