//Roll-over code		
Browser = false ;
if(document.images)
	{ Browser = true;
	
	a1 = new Image(); a1.src ="images/bt_conservatories1.jpg";
	a2 = new Image(); a2.src ="images/bt_conservatories2.jpg";
	
	b1 = new Image(); b1.src ="images/bt_doors1.jpg";
	b2 = new Image(); b2.src ="images/bt_doors2.jpg";

	c1 = new Image(); c1.src ="images/bt_windows1.jpg";
	c2 = new Image(); c2.src ="images/bt_windows2.jpg";

	}
	
function ark(place, imgName) {
if (Browser == true) {
document[place].src =eval(imgName + ".src");
} }
	//-->