//Roll-over code		
Browser = false ;
if(document.images)
	{ Browser = true;
	
	a1 = new Image(); a1.src = config_root+"pics/bt_about.gif";
	a2 = new Image(); a2.src = config_root+"pics/bt_about_roll.gif";
	
	b1 = new Image(); b1.src = config_root+"pics/bt_excavation.gif";
	b2 = new Image(); b2.src = config_root+"pics/bt_excavation_roll.gif";
	
	c1 = new Image(); c1.src = config_root+"pics/bt_demolition.gif";
	c2 = new Image(); c2.src = config_root+"pics/bt_demolition_roll.gif";
	
	d1 = new Image(); d1.src = config_root+"pics/bt_recycled.gif";
	d2 = new Image(); d2.src = config_root+"pics/bt_recycled_roll.gif";
	
	e1 = new Image(); e1.src = config_root+"pics/bt_planthire.gif";
	e2 = new Image(); e2.src = config_root+"pics/bt_planthire_roll.gif";
	
	f1 = new Image(); f1.src = config_root+"pics/bt_tipping.gif";
	f2 = new Image(); f2.src = config_root+"pics/bt_tipping_roll.gif";
	
	g1 = new Image(); g1.src = config_root+"pics/bt_casestudies.gif";
	g2 = new Image(); g2.src = config_root+"pics/bt_casestudies_roll.gif";
	
	h1 = new Image(); h1.src = config_root+"pics/bt_contact.gif";
	h2 = new Image(); h2.src = config_root+"pics/bt_contact_roll.gif";
	
	i1 = new Image(); i1.src = config_root+"pics/bt_home.gif";
	i2 = new Image(); i2.src = config_root+"pics/bt_home_roll.gif";
	
	}
	
function ark(place, imgName) {
if (Browser == true) {
document[place].src =eval(imgName + ".src");
} }
	//-->