weddings = new Image();      
weddings.src = "../images/weddings.jpg"; 
nature = new Image(); 
nature.src = "../images/nature.jpg";  
portraits = new Image();
portraits.src = "../images/portraits.jpg";
contact = new Image();
contact.src = "../images/contact.jpg";

weddingsOver = new Image(); 
weddingsOver.src = "../images/weddings_over.jpg"; 
natureOver = new Image();          
natureOver.src = "../images/nature_over.jpg"; 
portraitsOver = new Image();
portraitsOver.src = "../images/portraits_over.jpg";
contactOver = new Image();
contactOver.src = "../images/contact_over.jpg";

function toggleImage( action, name ){
	if (document.images){
		switch( action ){
			case 'over':
		  		document.getElementById(name).src = eval(name + "Over.src");
			break;
			case 'out':
				document.getElementById(name).src = eval(name + ".src");
			break;
		}
	}
}