pic1= new Image();
pic1.src="image/cat/1-on.jpg";
pic2= new Image();
pic2.src="image/cat/3-on.jpg";
pic3= new Image();
pic3.src="image/cat/4-on.jpg";
pic4= new Image();
pic4.src="image/cat/5-on.jpg";
pic5= new Image();
pic5.src="image/cat/6-on.jpg";
pic6= new Image();
pic6.src="image/skin/navHomeOn.png";
pic7= new Image();
pic7.src="image/skin/navTestimonialsOn.png";
pic8= new Image();
pic8.src="image/skin/navExhibitionsOn.png";
pic9= new Image();
pic9.src="image/skin/navContactOn.png";