// preloading the images

function preloadImages() {

	PPics = new Array(8);
	for (i = 0; i < 8; i++) {
		PPics[i] = new Image();
	}

	PPics[0].src = "images/photo/flowers1.jpg";
	PPics[1].src = "images/photo/flowers2.jpg";
	PPics[2].src = "images/photo/mountains1.jpg";
	PPics[3].src = "images/photo/mountains2.jpg";
	PPics[4].src = "images/photo/4x4.jpg";
	PPics[5].src = "images/photo/baby-flowers.jpg";
	PPics[6].src = "images/photo/frog.jpg";
	PPics[7].src = "images/photo/lake.jpg";
}

// function that replaces image
function replace(ImgToChange, ImgToShow){
ImgToChange.src=PPics[ImgToShow].src
}

preloadImages();