if(document.images){
	
	var on1 = new Image();on1.src="img/pergolas01.jpg";
	var on2 = new Image();on2.src="img/pergolas02.jpg";
	var on3 = new Image();on3.src="img/deck01.jpg";	
	var off = new Image();off.src="img/pergolas01.jpg";
	
	var t1on = new Image();t1on.src="img/t_pergolas01_o.jpg";
	var t1off = new Image();t1off.src="img/t_pergolas01.jpg";
	
	var t2on = new Image();t2on.src="img/t_pergolas02_o.jpg";
	var t2off = new Image();t2off.src="img/t_pergolas02.jpg";
	
	var t3on = new Image();t3on.src="img/t_deck01_o.jpg";
	var t3off = new Image();t3off.src="img/t_deck01.jpg";
	

}
function change(name,file){
if(document.images){//object test
eval('document.images.'+name+'.src="'+file+'";');
 }
}