images = new Array();
images[0] = new Image(); images[0].src = "image/prr_001.gif";
images[1] = new Image(); images[1].src = "image/prr_002.gif";
images[2] = new Image(); images[2].src = "image/prr_003.gif";
images[3] = new Image(); images[3].src = "image/prr_004.gif";

backs = new Array();
backs[0] = new Image(); backs[0].src = "image/pr_001.gif";
backs[1] = new Image(); backs[1].src = "image/pr_002.gif";
backs[2] = new Image(); backs[2].src = "image/pr_003.gif";
backs[3] = new Image(); backs[3].src = "image/pr_004.gif";


//マウツノーバー

function ImgChange(id){
	if(id == "pr1"){ n=0; }
	if(id == "pr2"){ n=1; }
	if(id == "pr3"){ n=2; }
	if(id == "pr4"){ n=3; }

	document.getElementById(id).setAttribute("src",images[n].src);
}
function ImgBack(id){
	document.getElementById(id).setAttribute("src",backs[n].src);
}